<p><strong>Our Library never stops expanding. What are the most recent contributions to LabRulezLCMS Library in the week of 10th August 2026? Check out new documents from the field of liquid phase, especially HPLC and LC/MS techniques!</strong></p><blockquote><p><span style="font-size:20px;">👉 </span><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library"><span style="font-size:20px;"><strong>SEARCH THE LARGEST REPOSITORY OF DOCUMENTS ABOUT LCMS AND RELATED TECHNIQUES</strong></span></a></p></blockquote><blockquote><p><strong>👉 Need info about different analytical techniques?</strong> Peek into <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library"><strong>LabRulezGCMS</strong></a> or <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library"><strong>LabRulezICPMS</strong></a> libraries.</p></blockquote><p>This week we bring you posters by <strong>Agilent Technologies / ASMS, Thermo Fisher Scientific / ASMS </strong>and<strong> Waters Corporation / ASMS </strong>and application notes by<strong> Metrohm and Shimadzu!</strong></p><h3><strong>1. Agilent Technologies / ASMS: Impurity Monitoring of GLP-1 Therapeutic Peptide RetatrutideUsing a 2D-LC/TOF System</strong></h3><ul><li>Poster</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/glp_1_impurity_monitoring_2d_lc_tof_asms_2026_mp_388_agilent_eadce3f244.pdf"><strong>Full PDF for download</strong></a></li></ul><p>Retatrutide is a next-generation triple agonist (GLP1/GIP/glucagon) and an emerging candidate among multivalent GLP1–based therapeutics. Its structural complexity and diverse impurity profile challenge conventional one-dimensional LC methods, which often lack sufficient resolving power to separate closely related impurities, sequence variants, and synthetic byproducts.&nbsp;</p><p>In this study, we demonstrate an Agilent multiple heart-cutting 2D-LC platform that enables rapid online solvent exchange and enhanced chromatographic selectivity, allowing targeted isolation of impurity peaks from a TFA-based first-dimension separation. When coupled with the Agilent 6230C Accurate Mass TOF LC/MS system, the workflow delivers fast, sensitive, and accurate mass profiling under MS-friendly second-dimension conditions, providing a robust solution for comprehensive impurity characterization of GLP-1 peptides such as Retatrutide.</p><h4><strong>Experimental</strong></h4><h5><strong>Instrumentation&nbsp;</strong></h5><ul><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library?instrumentationItems=39&amp;mainauthorItems=10&amp;search=1290+infinity+III+2D-LC"><strong>Agilent 1290 Infinity III 2D-LC system</strong></a><strong> comprised the following modules:&nbsp;</strong><ul><li>1290 Infinity III Bio Multisampler with Thermostat (G7137A)&nbsp;</li><li>1290 Infinity III Multicolumn Thermostat (G7116B)&nbsp;</li><li>1290 Infinity III Diode Array Detector (G7117B) with Max-Light cartridge cell (G7117-60020)&nbsp;</li><li>1260 Infinity III Bio Flexible Pump (G7131C)&nbsp;</li><li>1290 Infinity III Bio High-speed Pump (G7132A)&nbsp;</li><li>1290 Infinity Valve Drive (G1170A) with 2D-LC ASM Valve (G5643B)&nbsp;</li><li>Two 1290 Infinity III Valve Drives (G1170A) with multiple heart-cutting valves (G5642-64000) equipped with 40 µL Bio loops&nbsp;</li></ul></li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library?mainauthorItems=10&amp;search=6230C"><strong>Agilent 6230C Accurate Mass TOF LC/MS System</strong></a></li></ul><h4><strong>Conclusions</strong></h4><p>Agilent 2D-LC with multiple heart-cutting effectively bridges TFA-driven chromatographic performance with FA-compatible MS detection, overcoming ion suppression limitations.&nbsp;</p><p>The integrated 2D-LC/Accurate Mass TOF workflow delivers confident impurity identification and robust characterization, supporting peptide analysis in both QA/QC and development environments.</p><h3><strong>2. Metrohm: Vinylene carbonate water determination via coulometric Karl Fischer titration</strong></h3><p><strong>Water determination in vinylene carbonate by Karl Fischer coulometric titration made simple with alcohol-free reagents</strong></p><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/an_k_076_download_8658665940.pdf"><strong>Full PDF for download</strong></a></li></ul><p>Vinylene carbonate (vc) is commonly used as a battery electrolyte additive in lithium-ion batteries. Its popularity is due to the positive impact it has on anode cyclability and reduction of irreversible capacity. Small amounts of moisture in Li-ion batteries can significantly decrease performance and lifetime. Therefore, moisture levels in electrolyte solutions and their additives are controlled for use in manufacturing. Until recent years, accurate moisture quantification in vinylene carbonate samples was difficult due to side reactions. With the commercial development of alcohol-free coulometric Karl Fischer reagents, accurate determination is now much more accessible to end-users.</p><h4><strong>EXPERIMENTAL</strong></h4><p>This analysis was performed using an <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library?mainauthorItems=220&amp;search=852+titrando"><strong>852 Titrando</strong></a> (2.852.0060) instrument, equipped with the electrodes listed in Table 1.</p><h4><strong>CONCLUSION&nbsp;</strong></h4><p>During battery manufacturing, control of all moisture present is important to guarantee adequate performance in the finished product. More easily quantifying the moisture contribution from additives such as vinylene carbonate makes this a much simpler task. The introduction of alcohol-free Karl Fischer reagents accomplishes this effectively, allowing the generation of accurate and repeatable moisture data—even for a difficult sample matrix.</p><h3><strong>3. Shimadzu: Non-Targeted Analysis of Metabolites in Alcoholic Beverages Using LabSolutions Insight Profiler</strong></h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/an_01_01241_en_57b43edb57.pdf"><strong>Full PDF for download</strong></a></li></ul><h5><strong>User Benefits</strong></h5><ul><li>Using an LC-QTOFMS system with LabSolutions Insight Profiler non-targeted analysis software enables comprehensive comparative analysis of metabolites in food samples.&nbsp;</li><li>Principal component analysis and volcano plots can be used to detect characteristic features in each sample.&nbsp;</li><li>A variety of functions, including MS/MS spectral library searching, enable easy qualitative analysis of components.</li></ul><p>Metabolomics, a technique that analyzes metabolites in living organisms, is increasingly being applied in the food industry for product development and quality control. A particularly powerful approach is non-targeted metabolomics, which aims to analyze not only known metabolites but also unknown compounds without prior assumptions to reveal unexpected chemical differences between samples. Quadrupole time-of-flight mass spectrometry (QTOFMS), with its accurate-mass capability, is well suited for this purpose. However, the large volume of generated data creates challenges for feature identification and data comparison.&nbsp;</p><p>This article presents a case study in which LabSolutions Insight Profiler, a software platform for non-targeted analysis, was used to characterize compounds in beer and beer-like beverages. Peak detection, retention-time alignment, and library searching were performed across multiple datasets. Multivariate analysisrevealed compound profiles that likely reflect the differences in raw materials and manufacturing processes, demonstrating the utility of the approach for beverage characterization.</p><h4><strong>LabSolutions Insight Profiler&nbsp;</strong></h4><p><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library?mainauthorItems=1&amp;search=LabSolutions+Insight+Profiler"><strong>LabSolutions Insight Profiler </strong></a>is software for batch processing of LC-QTOFMS data that enables non-targeted analysis through an intuitive workflow. It readily supports easy spectral feature detection, alignment, statistical processing, filtering, list screening, MS/MS spectra-based library searching, principal component analysis (PCA), displaying volcano or box plots, and more. Fig. 1 shows the data analysis workflow.</p><h4><strong>Analysis Conditions&nbsp;</strong></h4><p><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library?mainauthorItems=1&amp;search=nexera+X3"><strong>Nexera X3 UHPLC</strong></a> and<strong> </strong><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library?mainauthorItems=1&amp;search=9030"><strong>LCMS-9030 systems</strong></a> were used as the analytical instruments. The LC method included in the LC/MS/MS Method Package for Primary Metabolites was used as the method. The data-dependent acquisition (DDA) mode was used to simultaneously acquire precursor m/z and MS/MS data. Table 2 shows the analysis conditions.</p><h4><strong>Conclusion&nbsp;</strong></h4><p>In this study, compounds in various beer and beer-like beverages were analyzed by non-targeted analysis using an LCMS-9030 quadrupole time-of-flight mass spectrometer system. Analyzing compounds characteristic of each sample with LabSolutions Insight Profiler software confirmed that the resulting profiles reflected differences in raw materials and manufacturing methods.&nbsp;</p><p>LabSolutions Insight Profiler enables efficient non-targeted analysis by processing LC-QTOFMS data with an intuitive workflow. This workflow allows for objective evaluation of the taste, quality, and nutritional value of food products. Furthermore, this method is applicable not only to the analysis of compounds in beverages but also to non-targeted analysis of other types of samples.</p><h3><strong>4. Thermo Fisher Scientific / ASMS: High throughput targeted proteomic workflows with Adaptive Retention Time on the </strong><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/1959"><strong>Orbitrap Astral Zoom MS</strong></a></h3><ul><li>Poster</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/po_004699_lsms_art_astral_zoom_proteomics_po004699_asms2026_na_en_78767efdc9.pdf"><strong>Full PDF for download</strong></a></li></ul><p>Advances in MS instrumentation have accelerated the identification of biomarkers, but validating and translating these discoveries into assays for clinical use remains challenging and typically requires robust and accurate targeted approaches. While these often rely on predetermined reference target retention time (RT) windows, analytical column degradation or replacement, aging solvents, sample matrix effects, etc. can cause peptide RT shifts between injections and across longer-term analyses. To accommodate this, targeted MS experiments generally schedule wide target RT windows (&gt;1 min) or rely on heavy labeled peptides to trigger acquisition of endogenous peptides. Both greatly limit the number of quantifiable targets per assay. To overcome this, we utilize adaptive RT (aRT) alignment for live correction of RTs together with the speed and sensitivity of the <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/1959"><strong>Orbitrap Astral Zoom MS</strong></a>. This allows reproducible tracking of &gt;2000 targets with narrow RT windows, high throughputs, such as 300 samples per day (SPD), and hybrid workflows combining targeting, of up to 1000 targets, and discovery.</p><h4><strong>Materials and methods&nbsp;</strong></h4><h5><strong>LC-MS Experiments&nbsp;</strong></h5><p>Experiments were performed using Thermo Scientific Pierce HeLa protein digest resuspended in 0.1% TFA, or individual or pooled human plasma samples. Peptides were separated using a 15 cm Thermo Scientific PepMap analytical columns (150 µm inner diameter) and the <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/398"><strong>Thermo Scientific Vanquish Neo UHPLC system</strong></a> at throughputs of 60 or 300 SPD. The liquid chromatography (LC) system was interfaced with the <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/1959"><strong>Orbitrap Astral Zoom MS.</strong></a> Reference runs using MS1 and/or data-independent-acquisition (DIA) scans were acquired to obtain reference aRT spectra, and to determine target RTs. For aRT alignment, methods consisting of aRT MS1 and/or DIA scans, as well as targeted MS2 scans with RT correction were optimized. For hybrid DIA workflows, we used aRT MS1 scans for reference acquisition and alignment, combined with narrow window DIA and a targeted MS2 experiment. Observed RT shifts were caused by natural column degradation, sample matrix effects or when indicated induced by variation in gradient flow rate and buffer composition.&nbsp;</p><h5><strong>Data analysis&nbsp;</strong></h5><p>Reference DIA data was analyzed using Spectronaut. Targets lists were then generated from the search output by selecting varying number of targets evenly distributed across the RT dimension. Target RTs for smaller scale assays were manually validated and exported from Skyline, while target RTs for large scale assays were exported from Spectronaut. For alignment runs, DIA and PRM data were analyzed using Spectronaut and Skyline respectively.</p><h4><strong>Conclusions&nbsp;</strong></h4><ul><li>Adaptive RT alignment on Orbitrap Astral Zoom MS shows robustness against various sources of RT shifts and has high target recovery even for thousands of targets&nbsp;</li><li>aRT enables the use of target acquisition windows &lt;15 s for robust targeting at high throughput&nbsp;</li><li>aRT Hybrid DIA allows targeting of up to 1000 targets with minimal cost to DIA depth</li></ul><h3><strong>5. Waters Corporation / ASMS: BOOSTING SENSITIVITY IN TOP-DOWN PROTEIN STUDIES USING CYCLIC IMS-ENABLED WIDEBAND ENHANCEMENT</strong></h3><ul><li>Poster</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/720009471_51f2e8b546.pdf"><strong>Full PDF for download</strong></a></li></ul><div><div><section><div><div><div><div><div><div><p>The poster evaluates <strong>Wideband Enhancement (WBE)</strong> as a way to improve sensitivity in top-down protein mass spectrometry. In top-down workflows, intact proteins are fragmented directly, but the signal is distributed across multiple charge states, isotope envelopes, and numerous product ions, which can limit MS/MS sensitivity. WBE addresses this problem by synchronizing ion packets leaving the ion mobility region with the time-of-flight pusher, thereby increasing the number of ions that reach the detector within a selected <i>m/z</i> range.</p><p>Experiments were performed using a <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/2434"><strong>Waters Cyclic IMS P20 Mass Spectrometer</strong></a> equipped with an <strong>electron capture dissociation cell</strong>. Samples were introduced by direct infusion in positive electrospray ionization mode. Two proteins were studied under denaturing conditions: bovine ubiquitin, approximately 8.5 kDa, and bovine carbonic anhydrase II, approximately 29 kDa. Single-pass and bypass ion mobility measurements were carried out with and without WBE, using both <strong>collision-induced dissociation (CID)</strong> and <strong>electron capture dissociation (ECD)</strong>. Data were acquired in <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/635"><strong>MassLynx</strong></a><strong> v4.2</strong> and processed using <strong>DriftScope</strong> and the <strong>waters_connect UNIFI peptide-mapping workflow</strong>.</p><p>For ubiquitin, WBE substantially increased the intensity of CID- and ECD-derived fragment ions. Improvements of up to tenfold were observed across the c- and z-ion series, while bypass ion mobility mode produced the largest overall sensitivity gain. The results indicate that WBE can enhance fragment detection while retaining the benefits of cyclic ion mobility separation and without sacrificing mass-spectral resolution.</p><p>The larger carbonic anhydrase II protein also showed marked improvements. CID fragment signals increased by up to tenfold for lower-<i>m/z</i> ions and about eightfold for higher-<i>m/z</i> fragments. Because ECD is generally less efficient than CID, the benefit of WBE was especially evident in ECD experiments: sequence coverage increased from <strong>54% without WBE to 70% with WBE</strong> in bypass mode. The authors conclude that combining WBE with complementary CID and ECD fragmentation on the Cyclic IMS P20 enables more sensitive and comprehensive top-down protein characterization.</p></div></div></div></div></div></div></section></div></div>

News from LabRulezLCMS Library - Week 33, 2026

<p><strong>Our Library never stops expanding. What are the most recent contributions to LabRulezICPMS Library in the week of 10th August 2026? Check out new documents from the field of spectroscopy/spectrometry and related techniques!</strong></p><blockquote><p><span style="font-size:20px;">👉 </span><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library"><span style="font-size:20px;"><strong>SEARCH THE LARGEST REPOSITORY OF DOCUMENTS ABOUT SPECTROSCOPY/SPECTROMETRY RELATED TECHNIQUES</strong></span></a></p></blockquote><blockquote><p><strong>👉 Need info about different analytical techniques?</strong> Peek into <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library"><strong>LabRulezLCMS</strong></a> or <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library"><strong>LabRulezGCMS</strong></a> libraries.</p></blockquote><p>This week we bring you application notes by <strong>Agilent Technologies,</strong> <strong>Shimadzu </strong>and <strong>Thermo Fisher Scientific!</strong></p><h3><strong>1. Agilent Technologies: Accurate and Robust Measurement of Elemental Impurities in Pharmaceuticals by ICP-MS</strong></h3><p><strong>Implementation of Indian Pharmacopeia General Chapter 5.10 compliant workflow using the </strong><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library?mainauthorItems=10&amp;search=7850"><strong>Agilent 7850 ICP-MS</strong></a></p><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/labrulez-bucket-strapi-h3hsga3/an_elemental_impurity_pharma_7850_icp_ms_5994_9312en_agilent_78f5dc61d6.pdf"><strong>Full PDF for download</strong></a><strong>&nbsp;</strong></li></ul><p>Elemental impurity testing is a vital part of pharmaceutical quality assurance because trace metals can enter drug products at various points of the manufacturing process. Impurities may originate from raw materials and excipients, leach from processing equipment, remain as residues from catalysts, or arise through environmental or packaging related contamination. Even at very low concentrations, certain metals pose toxicological risks, making their assessment and control essential for ensuring product safety.&nbsp;</p><p>To address these risks, global regulatory bodies—including the U.S. Food and Drug Administration (FDA), the European Medicines Agency (EMA), and other members of the International Council for Harmonization (ICH)—require manufacturers to perform systematic risk assessments and ongoing monitoring of elemental impurities. The harmonized ICH Q3D guideline provides the framework for this evaluation by defining toxicology based permitted daily exposure (PDE) limits. It also outlines expectations for analytical testing, reporting, and control strategies across a variety of dosage forms.&nbsp;</p><p>To align with these international regulatory standards, the draft Indian Pharmacopeia (IP) General Chapter 5.10 has been developed to harmonize with the corresponding requirements of the European, Japanese, and U.S. Pharmacopeias.6 Harmonization will ensure that India’s regulatory framework reflects globally accepted best practices for assessing and controlling elemental impurities. It will also ensure that pharmaceutical products manufactured for the Indian and global markets meet internationally aligned safety standards. As part of these harmonized expectations, IP General Chapter 5.10 mandates the quantitative determination of specified elemental impurities using validated, high performance analytical technologies such as ICP MS or ICP OES. These techniques provide the sensitivity, selectivity, and sample throughput required to reliably measure trace-level elemental impurities and demonstrate compliance with PDE based limits.&nbsp;</p><p>An <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library?mainauthorItems=10&amp;search=7850"><strong>Agilent 7850 ICP-MS</strong></a> was used in this study to meet the trace level elemental impurity requirements defined in IP General Chapter 5.10. Designed to quantify elements at low concentrations, the 7850 achieves detection limits suitable for accurate, confident measurement of impurities at sub ppb levels. Its advanced ORS4 collision cell technology uses helium (He) mode to effectively remove polyatomic interferences across multiple analytes, enabling reliable measurement of secondary or qualifier isotopes. This capability supports analyte confirmation as required by regulatory guidelines, including IP 5.10, ICH Q2(R1), USP &lt;233&gt;, and USP &lt;1225&gt;. The combination of sensitivity and spectral clarity is essential when testing regulated pharmaceutical products, where accuracy, reproducibility, and compliance with pharmacopeial limits are required.&nbsp;</p><p>The 7850 ICP-MS delivers robust performance in real-world pharmaceutical environments, where complex matrices and routine, high throughput testing are the norm. The hightemperature plasma improves matrix tolerance, minimizes matrix-induced interferences, and enhances ionization efficiency.8 This capability provides higher and more consistent sensitivity for poorly ionized elements such as As, Cd, and Hg, as well as platinum group elements (PGEs) including Os, Ir, and Pt. T</p><p>he 7850 ICP-MS system’s high matrix tolerance also enables efficient handling of diverse sample types, including active pharmaceutical ingredients (APIs), excipients, and finished dosage forms, without excessive dilution or instrument downtime. Long term signal stability ensures consistent results throughout long analytical runs, minimizing re-analysis and supporting dependable quality control (QC) testing.&nbsp;</p><p>The 7850 offers streamlined, workflow-based operation with intuitive software and pre-configured method templates that are aligned with pharmacopeial guidelines. Instrument parameters are automatically optimized, simplifying method development, minimizing operator intervention, and ensuring consistent analytical performance.&nbsp;</p><p>This application note outlines an end-to-end analytical workflow designed to help laboratories comply with the elemental impurity requirements of IP General Chapter 5.10 using ICP MS. Twenty four elements were determined in three types of oral drug products, and the method was evaluated against the performance criteria specified in IP 5.10.</p><h4><strong>Conclusion&nbsp;</strong></h4><p>The analytical approach described in draft Indian Pharmacopoeia (IP) General Chapter 5.10 for the determination of elemental impurities in pharmaceutical products was applied in this study using ICP-MS. Three over-the-counter oral tablet drugs were acid digested by microwave, spiked at various J levels, and analyzed for 24 target elements using an Agilent 7850 ICP-MS.&nbsp;</p><p>The 7850 ICP-MS, equipped with a robust plasma system and the ORS4 collision/reaction cell operating in helium mode, effectively minimized polyatomic interferences and enabled accurate measurement of target isotopes and qualifier ions. Its wide dynamic range detector further supported the analysis of all three oral drug products using a single analytical method and standard operating conditions.&nbsp;</p><p>Instrument setup and method development were simplified by selecting General Purpose plasma conditions, applying automated lens tuning, and using the ICH/USP preset method in the Agilent ICP-MS MassHunter software.&nbsp;</p><p>The method met all performance criteria outlined in IP 5.10, including specificity, accuracy, spike recovery, stability, and system suitability for both limit and quantitative procedures. Instrument detection limits were significantly lower than the J values for oral drugs, ensuring reliable quantification of elemental impurities at regulatory control levels.&nbsp;</p><p>Overall, the results confirm that the 7850 ICP-MS provides a reliable, sensitive, and efficient platform for compliance with IP 5.10 requirements for elemental impurity testing in oral drug products. The simplified method development, robust interference removal, and workflow-based operation significantly reduce analytical complexity while supporting consistent regulatory compliance for routine pharmaceutical quality control laboratories.</p><h3><strong>2. Shimadzu: Evaluation of Particle Size in Chocolate —Evaluation of Particle Size Distribution and Coarse Particles that Affect Texture</strong></h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/labrulez-bucket-strapi-h3hsga3/an_01_00624_en_ea48de171d.pdf"><strong>Full PDF for download</strong></a></li></ul><h5><strong>User benefits</strong></h5><ul><li>The solid particle size distribution in chocolate can be easily measured using the <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library?mainauthorItems=1&amp;search=SALD-2300"><strong>SALD-2300</strong></a>.&nbsp;</li><li>The <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library?mainauthorItems=1&amp;search=iSpect+DIA-10"><strong>iSpect DIA-10</strong></a> enables not only the measurement of particle size distribution but also, the number concentration of particles in a specified particle size range.</li></ul><p>Particle size distribution is one of the physical properties that describe the characteristics of materials and products containing particulate matter. In some cases, the difference in characteristics can be described simply by the average particle size. In other cases, the amount of particles above a certain size is important. The values to be noted vary depending on the type of material, product, and its intended use.&nbsp;</p><p>Here, chocolate is taken as an example of a product where particle size control is important. An example is presented of measuring the particle size distribution and the quantity of particles within a specific size range to assess the texture of chocolate.&nbsp;</p><p>When performing chocolate quality control, the particle size distribution is generally evaluated using a laser diffraction-type particle size distribution analyzer. In this article, in addition to using the SALD-2300 Laser Diffraction Particle Size Analyzer, the iSpect DIA-10 Dynamic Particle Image Analysis System is also employed to show the possibility of a slightly different evaluation approach to investigating the relationship between particle size/concentration and texture.</p><h4><strong>Measurement of Particle Size Distribution by </strong><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library?mainauthorItems=1&amp;search=SALD-2300"><strong>SALD-2300&nbsp;</strong></a></h4><p>Chocolate is solid at room temperature. Therefore, it must be dissolved (dispersed) in a solvent to measure the particle size distribution of the solid particles contained within it. Samples must also be diluted to a concentration suitable for the particle size distribution measuring analyzer. Isopropanol was selected as the dispersant because it can dissolve oil and fat and disperse the solid particles to measure the particle size distribution of just the solid particles in the chocolate.&nbsp;</p><p>Two commercial milk chocolate samples were used: sample F and sample UF. Taste tests were conducted by several individuals (including the author), and comparisons were made prior to measurement. The taste tests focused on texture differences and the smoothness on the palate and tongue. The results showed that although there were differences among individuals, most perceived sample UF as smoother than sample F, while sample F feltslightly rough.</p><h4><strong>Particle Size and Number Concentration Measurement by </strong><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library?mainauthorItems=1&amp;search=iSpect+DIA-10"><strong>iSpect DIA-10&nbsp;</strong></a></h4><p>So far, the particle size distribution of two types of chocolate has been measured using the SALD-2300, and the relationship between the results and the texture has been examined. Next, we considered the measurement results obtained using the iSpect DIA-10.&nbsp;</p><p>The iSpect DIA-10 is different from general image analysis type particle size measurement equipment, and it has the advantage of being able to detect almost all particles within the measurement range. As a result, it is possible to accurately calculate the number concentration in the measurement solution.</p><p>From the SALD-2300 measurement results, it is clear that the sample contains about 20 to 30 percent particles that are below 5 µm, which is the minimum measurement size of iSpect DIA-10. Therefore, it is not possible to capture the number concentration of all particlesin the sample.&nbsp;</p><p>On the other hand, since no particles exceed the measurement limit of 100 µm and almost all particles in the coarse particle region can be detected, it is possible to calculate the number concentration of particles above a certain size.&nbsp;</p><p>The results of measurements of samples F and UF using the iSpect DIA-10 are presented below. The dispersion procedure is the same as that for the SALD-2300 shown in Table 1, but the final concentration is equivalent to that of 0.1 g of chocolate dispersed in 1000 mL of isopropanol due to a further 50 times dilution during measurement.</p><h4><strong>Conclusion&nbsp;</strong></h4><p>In this article, the particle size distribution of chocolate was measured using two instruments, the SALD-2300 and the iSpect DIA-10, and introduced the relationship between these results and the texture perceived when the chocolate was eaten. By looking at the results of the two measurement methods together, it is believed that a more in-depth analysis is possible.&nbsp;</p><p>In particular, the results of the number concentration of coarse particles measured using the iSpect DIA-10 are considered useful for evaluating texture based on the quantity of coarse particles. This can be expected to be effective in the food field and other fields where the abundance of small quantities of coarse particlesisimportant.</p><h3><strong>3. Thermo Fisher Scientific: From waste to performance: Reactive extrusion upcycling validated by rheology and chemical (FTIR) imaging</strong></h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/labrulez-bucket-strapi-h3hsga3/from_waste_to_performance_an1803_en_8b501f445c.pdf"><strong>Full PDF for download</strong></a></li></ul><p>Global plastic production exceeds 400 million tons annually, with polypropylene among the most widely used polymers. This high volume of polymer production results in large amounts of plastic ending up in our environment. Recycling is a strong potential solution; however, mechanical recycling often leads to molecular weight degradation via chain scission, limiting performance in secondary applications.&nbsp;</p><p>Upcycling through reactive extrusion provides a pathway to restore or enhance performance by incorporating recycled streams into high-value matrices. Polyamide 12 (PA12) offers superior mechanical and thermal properties but is immiscible with polypropylene due to thermodynamic incompatibility.</p><p>Compatibilization using PP-g-MA enables interfacial stabilization through in situ formation of diblock copolymers via reaction between maleic anhydride groups and PA12 amine end groups. This study evaluates several aspects of the resultant plastic products:&nbsp;</p><ul><li>Molecular degradation of reprocessed PP&nbsp;</li><li>Rheological signatures of interfacial stabilization&nbsp;</li><li>Mechanical property recovery&nbsp;</li><li>Quantitative chemical homogeneity via FTIR mapping</li></ul><h4><strong>Materials and methods</strong></h4><p>Specimens were molded using the <strong>HAAKE MiniJet Pro Piston injection molding system:&nbsp;</strong></p><ul><li>25 mm disc specimens for rheology &nbsp;</li><li>Dog-bone specimens for tensile testing</li></ul><p>Rheological characterization was performed using oscillatory rheology. A <strong>HAAKE MARS iQ rotational rheometer </strong>was employed, measure key features.&nbsp;</p><ul><li>Parallel plate geometry&nbsp;</li><li>Amplitude sweep (LVR determination)&nbsp;</li><li>Frequency sweep (viscoelastic response)</li></ul><h5><strong>FTIR microscopy and chemical mapping</strong></h5><p>While rheological and mechanical testing provide indirect evidence of interfacial stabilization, direct chemical verification of phase distribution is required to confirm compatibilization efficiency. Immiscible polymer blends such as PP/PA12 exhibit morphology-dependent performance governed by droplet size, spatial distribution, and interfacial adhesion.&nbsp;</p><p>Micro-ATR Fourier transform infrared (FTIR) spectroscopy enables spatially resolved chemical analysis without extensive sample preparation. The <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library?mainauthorItems=3&amp;search=RaptIR"><strong>Nicolet RaptIR+ FTIR microscope</strong></a><strong> </strong>was used to collect high-density chemical maps of blend cross-sections, providing direct insight into compositional uniformity and interfacial mixing.&nbsp;</p><p>ATR sampling was selected to minimize preparation artifacts and avoid the need for thin microtomed sections. The evanescent wave penetration depth of less than a few microns enables surface-sensitive chemical characterization while maintaining high spectral quality.&nbsp;</p><p>To enable quantitative phase mapping, distinct and non-overlapping spectral markers were selected:&nbsp;</p><ul><li>PA12 amide I band (~1636 cm⁻¹) – characteristic carbonyl stretch of polyamide</li><li>PP methyl deformation (~1376 cm⁻¹) – characteristic polypropylene signature</li></ul><p>These bands were chosen for specific reasons:&nbsp;</p><ul><li>High intensity&nbsp;</li><li>Minimal overlap&nbsp;</li><li>Structural specificity</li></ul><h4><strong>Conclusion&nbsp;</strong></h4><p>Reactive extrusion of reprocessed polypropylene with PA12 using PP-g-MA successfully produced a mechanically robust upcycled material containing 50% recycled content.&nbsp;</p><p><strong>Key outcomes:&nbsp;</strong></p><ul><li>Rheology confirmed enhanced interfacial stability.&nbsp;</li><li>Tensile properties were restored to near-virgin PA12 performance.&nbsp;</li><li>FTIR chemical mapping provided quantitative compositional uniformity analysis.&nbsp;</li><li>Statistical treatment of mapping data enabled objective evaluation of compatibilization efficiency.&nbsp;</li></ul><p>The integrated workflow combining extrusion, molding, rheology, and FTIR microscopy enables accelerated development of sustainable polymer blends with validated performance.</p>

News from LabRulezICPMS Library - Week 33, 2026

<p><strong>This workflow confirms and quantifies 31 drugs of abuse in oral fluid (including THC) in a 4.5‑minute LC run on the </strong><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/1149"><strong>Thermo Scientific Stellar mass spectrometer</strong></a><strong> using full scan + targeted MS2 (tMS2) with both HCD and CID fragmentation. With 1 µL injection and 0.1% formic acid in water/methanol mobile phases, the method supports ~13 samples/hour (up to ~320/day continuous operation) while maintaining confirmation performance via ion ratios.</strong></p><blockquote><h5><strong>Method at a glance</strong></h5><ul><li><strong>What matrix is tested?</strong> Oral fluid</li><li><strong>How many drugs?</strong> 31 drugs of abuse (panel includes THC)</li><li><strong>Run time?</strong> 4.5 minutes</li><li><strong>Throughput?</strong> ~13 samples/hour → up to ~320 samples/day (24‑hour operation)</li><li><strong>Injection volume?</strong> 1 µL</li><li><strong>Mobile phases?</strong> 0.1% formic acid in water (A) and 0.1% formic acid in methanol (B)</li><li><strong>MS acquisition?</strong> Full scan + targeted MS2 (tMS2)</li><li><strong>Fragmentation?</strong> Compound‑optimized <strong>HCD</strong> and <strong>CID</strong> in the same targeted list</li><li><strong>Confirmation strategy?</strong> Ion ratios with ±20% tolerance (typical confirmatory approach)</li></ul></blockquote><h3><strong>Why oral fluid—and why speed matters</strong></h3><p>Oral fluid is attractive for clinical and forensic toxicology because collection is simple and the matrix aligns well with high‑volume workflows (workplace/occupational, roadside, and other settings). The challenge is building a method that’s simultaneously:</p><ul><li><strong>Broad enough</strong> for today’s drug panels</li><li><strong>Sensitive enough</strong> to reach required cutoffs</li><li><strong>Fast enough</strong> to keep sample queues under control</li><li><strong>Confirmation‑ready</strong> (consistent product ions and ion ratios)</li></ul><p>A <strong>4.5‑minute</strong> method is a practical lever here: compress runtime, raise throughput, and still keep confirmation quality by optimizing MS/MS conditions per compound.</p><h3><strong>The LC method</strong></h3><p>A short, efficient separation is the foundation of the workflow:</p><ul><li><strong>UHPLC system:</strong> <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/744"><strong>Thermo Scientific Vanquish Horizon UHPLC</strong></a></li><li><strong>Column:</strong> <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/424"><strong>Thermo Scientific Accucore Biphenyl</strong></a>, 50 × 2.1 mm, 2.6 µm</li><li><strong>Mobile phase A:</strong> 0.1% formic acid in water</li><li><strong>Mobile phase B:</strong> 0.1% formic acid in methanol</li><li><strong>Injection volume:</strong> <strong>1 µL</strong></li><li><strong>Gradient runtime:</strong> <strong>4.5 minutes</strong></li></ul><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Thermo_Fisher_Scientific_4_5_Minute_Oral_Fluid_LC_MS_Method_to_Detect_31_Drugs_of_Abuse_Using_Stellar_MS_fd3f3e8ea4.jpg" alt="Thermo Fisher Scientific: 4.5-Minute Oral Fluid LC MS Method to Detect 31 Drugs of Abuse Using Stellar MS: Figure 1: Thermo Scientific Vanquish Horizon UHPLC system." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Thermo_Fisher_Scientific_4_5_Minute_Oral_Fluid_LC_MS_Method_to_Detect_31_Drugs_of_Abuse_Using_Stellar_MS_fd3f3e8ea4.jpg 120w," sizes="100vw" width="747" height="969"></p><h3><strong>The MS method (Full scan + targeted MS<sup>2</sup> with HCD + CID)</strong></h3><h5><strong>Acquisition approach</strong></h5><p>This method uses a “two‑layer” strategy for quantitation + confirmation:</p><ol><li><strong>Full scan</strong> (broad coverage, context, quantitative support)</li><li><strong>Targeted MS<sup>2</sup> (tMS2)</strong> (confirmation‑focused product ions, ion ratios)</li></ol><h5><strong>The key differentiator: HCD and CID in one targeted list</strong></h5><p>Instead of forcing every analyte into a single fragmentation style, the method uses both:</p><ul><li><strong>HCD</strong> (beam‑type fragmentation)</li><li><strong>CID</strong> (resonance‑type fragmentation)</li></ul><h5><strong>Why that improves method development:</strong></h5><p>Drugs of abuse span multiple chemistries. A single collision approach often works “okay” for most compounds—but one or two analytes can become persistent problems (weak qualifiers, unstable ion ratios, excess noise). Having both <strong>HCD and CID</strong> available in one method lets you optimize per compound and move faster.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Thermo_Fisher_Scientific_4_5_Minute_Oral_Fluid_LC_MS_Method_to_Detect_31_Drugs_of_Abuse_Using_Stellar_MS_3_e4a95651a2.jpg" alt="Thermo Fisher Scientific: 4.5-Minute Oral Fluid LC MS Method to Detect 31 Drugs of Abuse Using Stellar MS: Figure 2: Thermo Scientific Stellar mass spectrometer." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Thermo_Fisher_Scientific_4_5_Minute_Oral_Fluid_LC_MS_Method_to_Detect_31_Drugs_of_Abuse_Using_Stellar_MS_3_e4a95651a2.jpg 245w," sizes="100vw" width="645" height="377"></p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Thermo_Fisher_Scientific_4_5_Minute_Oral_Fluid_LC_MS_Method_to_Detect_31_Drugs_of_Abuse_Using_Stellar_MS_5_88276eec6a.jpg" alt="Thermo Fisher Scientific: 4.5-Minute Oral Fluid LC MS Method to Detect 31 Drugs of Abuse Using Stellar MS: Figure 3: Full scan &amp; targeted MS2 methods, HCD and collision energies used." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Thermo_Fisher_Scientific_4_5_Minute_Oral_Fluid_LC_MS_Method_to_Detect_31_Drugs_of_Abuse_Using_Stellar_MS_5_88276eec6a.jpg 245w," sizes="100vw" width="768" height="279"></p><h3><strong>Why CID + HCD flexibility improves confirmation</strong></h3><p>In this workflow, <strong>HCD</strong> performed well for most compounds. But for <strong>buprenorphine</strong>, HCD produced one dominant product ion with additional low m/z noise and noticeable residual precursor. Using <strong>CID</strong> generated two high‑intensity product ions and delivered <strong>consistent ion ratios</strong> across the calibration range.</p><p>When your confirmation hinges on stable ion ratios, the ability to switch fragmentation mode (not just collision energy) is a method‑development advantage—especially for “problem analytes.”</p><h3><strong>Controllable ionization</strong></h3><p>Oral fluid methods often deal with limited sample volume and matrix effects. This workflow pairs low injection volume with ionization control using the Thermo Scientific OptaMax Plus HESI source.</p><ul><li>The OptaMax Plus HESI source supports high probe temperature capability (up to 650 °C).</li><li>In this study, a vaporizer temperature of 500 °C was used to help achieve sensitivity and improve relative peak areas across drugs of abuse.</li></ul><p><strong>Why this matters:</strong> If you’re injecting only 1 µL, ionization stability and efficiency can be the difference between “meets cutoff” and “misses at LOQ.”</p><h3><strong>Sample preparation</strong></h3><p>Oral fluid panels become more challenging when THC is included because most drugs of abuse are basic, while THC is largely neutral, and that can stress extraction chemistry.</p><p>In this workflow, oral fluid calibrators and samples were extracted using a mixed‑mode approach designed to recover THC alongside other drugs:</p><ul><li>Calibrators prepared across eight levels (broad dynamic range)</li><li>Extraction performed using mixed‑mode chemistry tips (SCX/WAX) in a dispersive SPE‑style workflow</li><li>Steps automated on a liquid handling platform to support high‑throughput consistency</li><li>Samples dried and reconstituted prior to LC‑MS analysis</li><li>Only 1 µL injected per run</li></ul><p>Even if your lab uses different automation or consumables, the method structure (fast LC + full scan + targeted MS2 with dual fragmentation) transfers well.</p><blockquote><h5><strong>Throughput math</strong></h5><ul><li><strong>4.5 minutes per injection</strong> → 60 / 4.5 = <strong>13.3 injections/hour</strong></li><li>That’s <strong>~13 samples/hour</strong> in typical phrasing</li><li>Over 24 hours: 13.3 × 24 = <strong>~320 samples/day</strong> (continuous operation)</li></ul><p>If you run a single shift, just scale accordingly (e.g., ~106/day for an 8‑hour shift, excluding QC and overhead).</p></blockquote><h3>Performance summary</h3><h5><strong>Sensitivity and linearity</strong></h5><ul><li><strong>Linearity</strong> from LOQs as low as <strong>0.25 ng/mL</strong> up to <strong>1,000 ng/mL</strong> (panel-dependent)</li><li>For THC specifically: <strong>LOQ at 1 ng/mL</strong>, with a dynamic range extending to <strong>1,000 ng/mL</strong> in this evaluation</li><li>Across the panel, LOQs were reported as <strong>lower than recommended confirmation cutoffs</strong> referenced in SAMHSA guidance and NSC Tier 1 cutoffs (study-specific outcome)</li></ul><h5><strong>Confirmation via ion ratios</strong></h5><ul><li>Ion ratios evaluated using <strong>±20% tolerance</strong> (typical confirmatory acceptance framework)</li><li>The workflow produced <strong>consistent ion ratios across calibrator levels</strong> for the full panel in this evaluation</li></ul><h5><strong>Case sample comparison (real-world relevance)</strong></h5><p>When compared against a validated triple quadrupole method for case study samples, the Stellar MS workflow:</p><ul><li>Confirmed the positive hits observed by the reference method</li><li>Reported a few additional positives for select analytes, attributed to lower LOQs</li><li>Highlighted an operational efficiency point: <strong>1 µL injection</strong> in this method versus <strong>20 µL injection</strong> in the compared method</li></ul><h3><strong>FAQ</strong></h3><div><div><ol><li><strong>How long does the LC‑MS run take for the 31‑drug oral fluid panel?</strong><br><strong>4.5 minutes per injection</strong> using a short UHPLC gradient.<br>&nbsp;</li><li><strong>How many drugs of abuse can Stellar MS detect in this workflow?</strong><br><strong>31 drugs of abuse</strong>, including <strong>THC</strong>, using full scan + targeted MS2.<br>&nbsp;</li><li><strong>What MS/MS approach is used?</strong><br>A combined strategy: <strong>full scan</strong> plus <strong>targeted MS2 (tMS2)</strong> for confirmation.<br>&nbsp;</li><li><strong>Why use both HCD and CID?</strong><br>Because some analytes fragment better—and produce more stable confirmation ions/ion ratios—under one mode versus the other. Using both increases flexibility and speeds method optimization.<br>&nbsp;</li><li><strong>What injection volume is used?</strong><br><strong>1 µL</strong> of extracted sample.<br>&nbsp;</li><li><strong>What mobile phases are used?</strong><br><strong>0.1% formic acid in water (A)</strong> and <strong>0.1% formic acid in methanol (B)</strong>.<br>&nbsp;</li><li><strong>How many samples can you run per day?</strong><br>At 4.5 minutes/injection, throughput is <strong>~13 samples/hour</strong> or <strong>up to ~320/day</strong> with continuous operation (actual throughput depends on QC and scheduling).</li></ol></div></div><h3><strong>What makes this workflow “easy” to develop on Stellar MS</strong></h3><p>Here’s the short list of features that directly reduce method‑development friction:</p><ul><li><strong>HCD or CID</strong> in one method → optimize per compound, not compromise</li><li><strong>Fast MS2 acquisition speeds</strong> (up to 140 Hz for MS2) → more data points across narrow peaks</li><li><strong>Fast polarity switching</strong> (true 5 ms) → supports mixed panels efficiently</li><li><strong>Adaptive RT</strong> (real‑time retention time window adjustment) → helps reduce reinjections when retention times drift (e.g., column aging) and supports method transfer from longer to shorter gradients</li><li><strong>OptaMax Plus HESI</strong> source control → supports sensitivity at low injection volumes</li></ul><p><i>If you’re building a fast oral fluid confirmation workflow—or updating an existing DOA panel—this 4.5‑minute method shows how Stellar MS can combine <strong>speed, confirmation-ready MS2, and fragmentation flexibility (HCD + CID)</strong> in a single targeted workflow. Reach out to learn how to adapt the targeted list, collision settings, and scheduling strategy to your lab’s cutoffs and throughput goals.</i></p><blockquote><p><strong>Visit us on&nbsp;</strong><a target="_blank" rel="noopener noreferrer" href="https://www.linkedin.com/showcase/72003132/admin/dashboard/"><strong><u>LinkedIn:</u></strong></a><strong>&nbsp;</strong>#MassSpectrometry #OralFluid #DrugsOfAbuse #MethodDevelopment #HighThroughput</p></blockquote>

4.5-Minute Oral Fluid LC MS Method to Detect 31 Drugs of Abuse Using Stellar MS

<p><strong>As agriculture practices shift to be more sustainable and regenerative, the focus on soil health is growing—soil is no longer seen as just a growing medium, but as a living, teeming ecosystem. At the heart of this transformation is Total Organic Carbon (TOC), a key indicator of soil vitality, fertility, and its ability to sequester carbon from the atmosphere. Measuring soil organic carbon helps growers understand the biological health of their fields and track the effectiveness of regenerative agriculture practices.</strong></p><h3><strong>Why Total Organic Carbon in Soil Matters for Regenerative Agriculture</strong></h3><p>TOC represents the carbon stored in soil organic matter, which plays a vital role in supporting microbial life, improving nutrient availability, and enhancing soil structure. These benefits translate directly into better water retention, reduced erosion, and more resilient crops—all essential outcomes for regenerative systems aiming to restore ecosystems while maintaining productivity.</p><p>TOC is also central to carbon sequestration within soils, a cornerstone of climate-smart agriculture. By increasing organic carbon in soils, farmers can help to store carbon from the atmosphere while also improving long-term soil fertility. Practices like intensive tillage or overharvesting can deplete organic carbon in soil. That’s why routine, precise analysis is essential for maintaining and improving soil health over time.</p><h3><strong>TOC Analysis: A Critical Step Toward Smarter Soil Management</strong></h3><p>To harness the benefits of organic carbon, growers must first understand how much is present in their soil. Regular TOC analysis allows farmers to:</p><ul><li>Track the impact of regenerative practices like cover cropping, reduced tillage, and compost application.</li><li>Optimize soil amendments to build organic matter without over-applying inputs.</li><li>Monitor carbon sequestration progress as part of sustainability or carbon programs.</li></ul><h3><strong>Fast, Accurate TOC Analysis with LECO Solutions</strong></h3><p>The most common method for determining total organic carbon in soil is&nbsp;acid digestion combustion, where inorganic carbon is removed via acid treatment, leaving only the organic fraction for analysis. <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/products/1883"><strong>LECO’s&nbsp;832 Series</strong>&nbsp;</a>streamlines this process with a high-efficiency combustion furnace and advanced IR detection, delivering&nbsp;fast, accurate, and reproducible results. To further enhance efficiency, <a target="_blank" rel="noopener noreferrer" href="https://www.leco.com/documents/209-141-005/"><strong>LECO’s&nbsp;Non-Porous Ceramic Boats&nbsp;</strong></a>allow acid treatment to occur directly in the combustion vessel, eliminating the need for multiple transfers and reducing the risk of contamination or loss.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/LECO_rada_832_Analyza_spalovanim_pro_stanoveni_siry_a_uhliku_3_0ad3a64b2b.jpg" alt="LECO: The Importance of Analyzing Total Organic Carbon in Soil in Regenerative Agriculture: LECO 832 Series Combustion analysis for Sulfur and Carbon determination" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_LECO_rada_832_Analyza_spalovanim_pro_stanoveni_siry_a_uhliku_3_0ad3a64b2b.jpg 139w," sizes="100vw" width="679" height="760"></p><h3><strong>Supporting the Future of Sustainable, Regenerative Agriculture</strong></h3><p>As regenerative agriculture continues to expand, so does the need for&nbsp;high-throughput, reliable TOC analysis. Whether you’re managing a research lab, supporting carbon farming initiatives, or simply working to improve your&nbsp;soil, LECO’s solutions are designed to meet the demands of modern, sustainability-focused agriculture.</p><p>If you’re interested in learning more about determining total organic carbon, you can read our application note <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/labrulez-bucket-strapi-h3hsga3/C832_TOTAL_ORGANIC_CARBON_SOIL_ROCK_SHALE_203_821_679_b48939f659.pdf"><strong>“Determination of Total Carbon (TC) and Total Organic Carbon (TOC) in Soil by Acid Digestion and Combustion”</strong></a>, which discusses analysis methods and the advantages of using a<a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/products/1883"><strong> C832 Carbon Analyzer</strong></a>.</p>

The Importance of Analyzing Total Organic Carbon in Soil in Regenerative Agriculture

<p><strong>Our Library never stops expanding. What are the most recent contributions to LabRulezGCMS Library in the week of 17th August 2026? Check out new documents from the field of the gas phase, especially GC and GC/MS techniques!</strong></p><blockquote><p><span style="font-size:20px;">👉 </span><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library"><span style="font-size:20px;"><strong>SEARCH THE LARGEST REPOSITORY OF DOCUMENTS ABOUT GCMS AND RELATED TECHNIQUES</strong></span></a></p></blockquote><blockquote><p><strong>👉 Need info about different analytical techniques?</strong> Peek into <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library"><strong>LabRulezLCMS</strong></a> or <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library"><strong>LabRulezICPMS</strong></a> libraries.</p></blockquote><p>This week we bring you application notes by <strong>Shimadzu </strong>and <strong>Waters Corporation</strong>, brochure by<strong> Thermo Fisher Scientific </strong>and poster by<strong> MDCW / Arizona State University!</strong></p><h3><strong>1. MDCW / Arizona State University: Identifying Non-Biological Variance in Untargeted Analysis in Breath VOCs</strong></h3><ul><li>Poster</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/P_8_Zabin_7786c8003b.pdf"><strong>Full PDF for download</strong></a></li></ul><section><div><div><div><div><div><div><p>When performing untargeted analyses for breath biomarker discovery, the goal is to identify biological signals in the breath chemistry that can help detect disease states, probe microbial interactions, and track environmental exposures. However, untargeted metabolomics and downstream data analysis workflows are vulnerable to signal contamination by non-biological variance associated with sample collection and handling and instrumental drift, which can obscure meaningful biological patterns.&nbsp;</p><h4><strong>Objective/Aims</strong></h4><p>The goal of this study is to identify and quantify non-biological variance in untargeted volatile metabolomics arising from sample collection procedures and instrumental drift.</p><h4><strong>Methods</strong></h4><p>Breath samples were collected and transferred onto Thermal Desorption Tubes (TDTs) in technical duplicates. TDTs were stored at 4˚C and analyzed using two-dimensional gas chromatography coupled to time-of-flight mass spectrometry (<a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/37"><strong>GC×GC– TOFMS</strong></a>).</p><h4><strong>Conclusions</strong></h4><p>Instrument drift and other non-biological factors can strongly affect metabolomics data. Consistent, timedependent patterns of dissimilarity highlight the need to identify and control these sources of variance to ensure reliable biomarker discovery.</p><h3><strong>2. Shimadzu: Analysis of Volatile PFAS in Textiles Using </strong><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=1&amp;search=GCMS-TQ8040+RX"><strong>GCMS-TQ8040 RX</strong></a><strong> with MMI</strong></h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/an_01_01257_en_beb993613a.pdf"><strong>Full PDF for download</strong></a></li></ul><h4><strong>User benefits</strong></h4><ul><li>Using the GCMS-TQ8040 RX and the Multi-Mode Injection Unit (MMI), 12 volatile PFAS including compounds listed in EN 17681-2,<br>can be analyzed at the ppb level without preconcentration.</li><li>The spike recovery test shows good percentage recoveries of all compounds (80–120 %) that are at or below the EU Persistent<br>Organic Pollutants (POPs) threshold limit (25 ppb)</li></ul><p>Per- and polyfluoroalkyl substances (PFAS) are used in textile products because of their useful properties, such as heat resistance and water repellency. However, PFAS are also extremely stable substances that resist degradation and accumulate in the environment, which has led to concerns about their effects on humans. Since eliminating sources of PFAS is essential to prevent them from accumulating in the environment and in living organisms, many countries are passing laws that restrict the production, distribution, and use of PFAS in products. For example, the EU POPs Regulation sets a permitted threshold of up to 0.025 mg/kg (25 ppb) for certain PFAS (including PFOA, PFOS, and PFHxS) in substances, mixtures, or articles1) . EN 17681 defines standard test methods for PFAS analysis in textiles2),3) .&nbsp;</p><p>In a previous <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/an_01_01108_en_e04fe25939.pdf"><strong>Application News, No. 01-01108</strong></a>, an example of analyzing volatile and nonvolatile PFAS in textiles using LC/MS/MS and GC/MS/MS based on this standard was introduced. This study shows an example of trace analysis of volatile PFAS (Table1) in textiles using the newly developed GCMS-TQ RX series equipped with the Multi-Mode Injection Unit (MMI).</p><h4><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=1&amp;search=GCMS-TQ8040+RX"><strong>GCMS-TQ8040 RX&nbsp;</strong></a></h4><p>Delivering highly sensitive multi-component simultaneous analysis, the system improves operational efficiency through Analytical Intelligence , while also providing performance as a single GC-MS. The GCMS-TQ RX Series is a versatile triple quadrupole GC-MS that demonstrates high performance across a wide range of application fields. By combining it with the newly developed Multi-Mode Injection Unit (MMI), multiple injection methods are supported and analytical capability is further expanded.</p><h4><strong>Multi-Mode Injection Unit (MMI)&nbsp;</strong></h4><p>The Multi-Mode Injection Unit (MMI) supports a wide range of injection modes in a single unit, including split/splitless (SPL), programmable temperature vaporization (PTV), large-volume injection (LVI), direct injection, and thermal desorption/extraction (TD/TE). Dedicated software with an intuitive user interface enables easy method creation and seamless method transfer, simplifying analytical workflows. In this Application News, use of the MMI enables a threefold increase the injection volume compared with conventional injection methods, while maintaining peak shape.</p><h4><strong>Conclusion&nbsp;</strong></h4><p>Using the GCMS-TQ8040 RX and the MMI, volatile PFAS in textiles were analyzed. The results showed that all compounds measured in this study could be analyzed at 25 ppb or below. Furthermore, in the spike recovery test at the EU POPs regulatory limit of 25 ppb, recoveries were within 80 to 120 % for all compounds, showing good results. By increasing the injection volume with the MMI, trace levels of volatile PFAS can be measured even with the standard GCMS-TQ8040 RX model.</p><h3><strong>3. Thermo Fisher Scientific: Increase manufacturing productivity with handheld Raman analyzers</strong></h3><ul><li>Product specification</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/tsg3_product_spec_en_c5faf63c57.pdf"><strong>Full PDF for download</strong></a></li></ul><p>Raw material ID testing for pharmaceutical and biotechnology manufacturing quality control processes requires speed, ease and efficiency to maintain continuous manufacturing. Samples are often brought to a quality control lab for testing, increasing costs and decreasing productivity. The Thermo Scientific™ TruScan™ G3 Handheld Raman Analyzer enables non-technical operators to rapidly perform raw material ID testing without the need of a lab, bringing lab-quality performance and results to any setting, whether that be a warehouse or loading dock.&nbsp;</p><p>The <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=3&amp;search=TruScan+G3"><strong>TruScan G3 Handheld Raman Analyzer</strong></a> uses lab-proven Raman spectroscopy to perform rapid material identification at the point of need to decrease sampling costs and increase inventory turns. Designed for intuitive operation, its non-destructive point-and-shoot sampling principle facilitates rapid verification of a broad range of chemical compounds through sealed packaging to minimize the risk of contamination and exposure.&nbsp;</p><p>The TruScan G3 Handheld Raman Analyzer is built with a state-of-the-art optical platform paired with a field-proven embedded chemometrics engine. Our patented, multivariate residual analysis offers the most effective chemometric solution for material identification – with two spectral pre-processing options, that are easy to operate in challenging environments and sampling conditions.</p><h4><strong>Key features&nbsp;</strong></h4><ul><li>Non-destructive, point and shoot sampling through plastic bags, glass containers, blister packs and clear gel caps&nbsp;</li><li>Optional immersion probe for in-situ analysis and ergonomic comfort</li><li>Backwards compatibility with TruScan RM Handheld Raman Analyzer validated methods, makes TruScan G3 Handheld Raman Analyzer deployment a quick method transfer for a near seamless experience&nbsp;</li><li>A secured method for transferring of data via WIFI or wired connection for peace of mind&nbsp;</li><li>No frequent hardware maintenance nor consumables to operate are required&nbsp;</li><li>Digital data sign-off enhances 21 CFR Part 11 compliance&nbsp;</li></ul><h4><strong>Applications&nbsp;</strong></h4><ul><li>Incoming raw, in-process, or finished material identity verification&nbsp;</li><li>Identity check prior to dispensing of materials during manufacturing&nbsp;</li><li>Field or laboratory counterfeit drug identification</li></ul><h3><strong>4. Waters Corporation: Extending PFAS Analytical Workflows with APGC-MS/MS Analysis: A Method for 35 GC-Amenable PFAS Compounds</strong></h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/720009500_en_4b615b3bc2.pdf"><strong>Full PDF for download</strong></a></li></ul><h4><strong>Benefits&nbsp;</strong></h4><ul><li>An APGC-MS/MS method for the analysis of 35 GC-amenable PFAS allowing for characterization of PFAS samples beyond the suite of commonly targeted LC-MS/MS compounds, for a more complete assessment of PFAS burden</li><li>Injection of samples already extracted for LC-MS/MS analysis is possible without having to perform solvent exchange, saving time and labor &nbsp;</li><li>Sensitive and robust analysis to detect trace levels of PFAS in samples</li></ul><p>Routine PFAS analysis most commonly utilizes liquid chromatography (LC) as the separation technique and is the basis for most standardized methods that are currently available. While this is a key technique in the analysis of PFAS, there are classes of volatile and semi-volatile PFAS that do not chromatograph well using LC and require the use of gas chromatography (GC) to be successfully analyzed. Classes of PFAS that favor GC analysis include, but are not limited to, fluorotelomer alcohols (FTOH), fluorotelomer acrylates (FTAcr), fluorotelomer methacrylates (FTMAC), and fluorotelomer acetates (FTOAc). Additionally, there are classes that can be analyzed using both LC and GC techniques, including sulfonamides (PFSA) and sulfonamidoethanols (PFSE).&nbsp;</p><p>All of these compounds are considered precursor compounds that terminally transform into the most widely studied PFAS, perfluoroalkyl carboxylates (PFCA) and perfluoroalkyl sulfonates (PFSA). Not only are they precursors in the synthesis of PFCA and PFSA end products, they are also intentionally used in products such as food packaging and textiles to impart grease and water proofing qualities.&nbsp;</p><p>These precursor compounds are also discharged into the environment through similar routes as their end products (landfills, manufacturing waste, firefighting foams, etc), but also through volatilization, transport and deposition through the atmosphere either in the gas phase or bound to particulates. Like most PFAS, not much is known about the human toxicity of these particular PFAS, although some animal and in vitro studies do point to similar health effects as more commonly studied PFCAs and PFSAs, including liver and kidney toxicity, endocrine disruption and negative immune effects.1-4 Furthermore, their ability to transform in the environment to PFCAs and PFSAs, which are known to have toxic health implications, make them of concern.&nbsp;</p><p>GC-MS/MS analysis for the volatile and semi-volatile GC amenable PFAS provides an additional tool in the workflow of PFAS sample analysis, increasing the comprehensiveness of sample characterization. In this application note, the development of an atmospheric pressure gas chromatography (APGC) coupled to tandem quadrupole mass spectrometry (MS/MS) method will be presented. Application of this method to authentic samples will be explored in a companion application note.</p><h4><strong>Experimental</strong></h4><ul><li><strong>GC system:</strong> <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=10&amp;search=8890"><strong>Agilent 8890&nbsp;</strong></a></li><li><strong>Autosampler:</strong> <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=10&amp;search=7693A"><strong>7693A ALS</strong></a></li><li><strong>MS system:</strong> <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/554"><strong>Xevo™ TQ Absolute Mass Spectrometer&nbsp;</strong></a></li><li><strong>Ionization mode:</strong> API+</li></ul><h4><strong>Conclusion&nbsp;</strong></h4><p>An optimized APGC-MS/MS method for the analysis of 35 GC amenable PFAS has been presented, providing a practical way to extend existing workflows with sensitive and accurate analysis for fluorotelomer alcohols, acrylates, methacrylates, acetates, sulfonamides and sulfonamidoethanols. This approach could integrate seamlessly with existing LC-MS/MS workflows, allowing labs to extend compound coverage without requiring changes to established sample preparation protocols. Performance for all compounds was found to be optimal with the use of a siltek deactivated inlet liner and a 30 m x 0.25 mm ID, 0.50 µm Rtx-200 column. This configuration allows for the injection of samples pre-extracted for LC-MS/MS analysis that are in mainly methanol and water, allowing labs to generate additional insights without increasing sample prep burden. Method LLOQs ranged from 0.005 – 5.0 ng/mL, with most compounds being below 0.10 ng/mL, delivering robust performance across compound classes, indicating the method can be used for trace level applications. Overall, APGC-MS/MS adds a complementary capability to LC-MS/MS methods, allowing labs to comprehensively assess PFAS contamination for better understanding and informed regulatory or product safety decisions. Further application notes will demonstrate the use of this method in environmental and food packaging samples, highlighting how labs can gain more complete PFAS insights while leveraging existing workflows.</p></div></div></div></div></div></div></section>

News from LabRulezGCMS Library - Week 34, 2026

<p><strong>Our Library never stops expanding. What are the most recent contributions to LabRulezLCMS Library in the week of 17th August 2026? Check out new documents from the field of liquid phase, especially HPLC and LC/MS techniques!</strong></p><blockquote><p><span style="font-size:20px;">👉 </span><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library"><span style="font-size:20px;"><strong>SEARCH THE LARGEST REPOSITORY OF DOCUMENTS ABOUT LCMS AND RELATED TECHNIQUES</strong></span></a></p></blockquote><blockquote><p><strong>👉 Need info about different analytical techniques?</strong> Peek into <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library"><strong>LabRulezGCMS</strong></a> or <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library"><strong>LabRulezICPMS</strong></a> libraries.</p></blockquote><p>This week we bring you posters by <strong>Agilent Technologies / ASMS, Thermo Fisher Scientific / ASMS </strong>and<strong> Shimadzu / ASMS </strong>and application note by<strong> Waters Corporation!</strong></p><h3><strong>1. Agilent Technologies / ASMS: Quantitation of N-Nitroso Duloxetine N-Nitrosamine Drug Substance Related Impurities (NDSRI) in API and Formulation by 6475 LC/TQ</strong></h3><ul><li>Poster</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/po_drug_impurities_lc_tq_tp_402_asms_2026_en_agilent_b933b9bddf.pdf"><strong>Full PDF for download</strong></a></li></ul><p>Nitrosamine impurities are nitroso derivatives where the nitroso group is attached to an amine. The active pharmaceutical ingredient (API) derived from a class of nitrosamines are known as N-nitrosamine drugsubstance-related impurities (NDSRI). Nitrosamine impurities in APIs and drug products pose safety concerns, even in small quantities, and thus are a major concern for drug makers [1].&nbsp;</p><p>Analytical methods must be sufficiently sensitive to quantify the nitrosamine of interest at levels as low as 10% of the specification limit and, where feasible, down to ≤5% of the specification limit, for the determination of the limit of detection. LC/MS/MS is an inherently selective and highly sensitive analytical technique that is well suited for the identification and quantification of trace-level impurities at extremely low concentrations. Consequently, LC/MS/MS has been widely adopted within the pharmaceutical industry, particularly for nitrosamine analysis [2-3].&nbsp;</p><p>Therefore, manufacturers must develop and qualify a dedicated analytical method that is appropriate for the specific sample matrix and targeted NDSRIs. An LC/MS/MS method based on multiple reaction monitoring (MRM) was developed for the detection and quantification of the N-nitroso duloxetine NDSRI impurity over a concentration range of 0.5 to 40 ppb (absolute standard concentration), using an atmospheric pressure chemical ionization (APCI) source on an Agilent 6475A LC/TQ instrument.</p><h4><strong>Experimental</strong></h4><ul><li><strong>MS:</strong> <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library?mainauthorItems=10&amp;search=6475"><strong>6475 Triple Quadrupole LC/MS System</strong></a></li><li><strong>Column:</strong> <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library?mainauthorItems=10&amp;search=Poroshell+HPH+C18"><strong>Poroshell HPH C18</strong></a> (4.6*150mm, 2.7µm)</li></ul><h4><strong>Conclusions</strong></h4><ul><li>A highly sensitive and robust MRM LC/MS/MS method was developed for the quantitation of N-nitroso duloxetine in duloxetine hydrochloride API and finished formulation using the Agilent 6475A LC/TQ.&nbsp;</li><li>The optimized chromatographic conditions provided effective separation of the analyte from the API, placebo, and formulation matrices, ensuring reliable quantitation.&nbsp;</li><li>The calibration curve was linear over the concentration range of 0.5-40 ng/mL, with 1/x weighting. R and R2 values were observed for both to be greater than 0.99.&nbsp;</li><li>Recovery studies demonstrated efficient sample extraction, with recoveries ranging from 92-99% in API samples and 109-116% in pellet formulations at the LOQ, specification, and 200% specification levels.&nbsp;</li><li>The method also showed excellent reproducibility across all evaluated concentration levels, confirming its suitability for routine analysis.</li></ul><h3><strong>2. Shimadzu / ASMS: Non-Targeted Analysis of Per- and Polyfluoroalkyl Substances in Environmental Extracts by Microflow LC-QToF Coupled with Multi-spray ESI</strong></h3><ul><li>Poster</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/TP_562_Non_Targeted_Analysis_of_Per_and_Polyfluoroalkyl_Substances_in_Environmental_Extracts_by_Microflow_LC_Q_To_F_Coupled_with_Multi_spray_ESI_c2a7e1d5bf.pdf"><strong>Full PDF for download</strong></a></li></ul><p>Targeted screening methods are well established for monitoring Perand polyfluoroalkyl substances (PFAS) in environmental samples. However, PFAS comprise a large and evolving class of compounds, creating a need to screen existing, emerging, and transformation products across diverse matrices. Non-targeted Analysis (NTA) allows for the confirmation of suspected PFAS in the environment, but the sample characterization is often limited by analytical sensitivity. Microflow (0.5 – 40 µL/min) coupled with a multi-nozzle emitter enhances sensitivity by improving desolvation. When this is coupled to a high mass accuracy and resolution Quadrupole Time-ofFlight Mass Spectrometer (QToF), capable of data-dependent and independent MS/MS, PFAS characterization of unknown analytes is possible. In this study, various environmental extracts were processed and screened using NTA for PFAS compounds.</p><h4><strong>Methods</strong></h4><p>A <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library?mainauthorItems=1&amp;search=Nexera+Mikros"><strong>Shimadzu Nexera Mikros LC</strong> </a>was used to introduce the sample to a Newomics DuoESI source with an M3 emitter on a <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library?mainauthorItems=1&amp;search=9050"><strong>LCMS-9050 QToF MS</strong></a> (Fig. 1). A direct injection on an octadecyl column without delay column was performed. Direct injection was chosen over trapand-elute configuration to minimize selectivity bias caused by the trap column.&nbsp;</p><h4><strong>Conclusion</strong></h4><p>With the increased sensitivity of microflow LC-QToF coupled with multi-spray ESI with DIA acquisition, Insight Explore aided in NTA PFAS analysis. When paired with Insight Discovery and Profiler, a streamlined batch data processing workflow with statistical analysis was shown to effectively handle complex environmental matrices and their analyses.</p><h3><strong>3. Thermo Fisher Scientific / ASMS: Robust and sensitive quantitation of 18 steroids in human serum using Thermo Scientific TSQ Certis Triple Quadrupole mass spectrometer</strong></h3><ul><li>Poster</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/po_004707_lsms_18_steroids_tsq_certis_clinical_po004707_asms2026_na_en_244c52437b.pdf"><strong>Full PDF for download</strong></a></li></ul><p>Accurate quantification of endogenous steroids in human serum is essential for biomonitoring physiological functions such as hormone regulation, reproduction, and immune response in clinical research laboratories. Liquid chromatography–tandem mass spectrometry (LC–MS/MS) is the gold standard for steroid analysis due to its superior sensitivity, selectivity, and multiplexing capability compared to immunoassays. However, steroid measurements remain challenging because of low endogenous concentrations and complex serum matrices. Here, we describe a robust and sensitive LC–MS/MS method for the simultaneous quantification of 18 steroids in human serum using the Thermo Scientific TSQ Certis triple quadrupole mass spectrometer (Figure 1). The method leverages advanced ion source design and fast acquisition to deliver enhanced sensitivity, stability and throughput suitable for high-volume laboratory workflows.</p><h4><strong>Materials and methods</strong></h4><h5><strong>Liquid chromatograph – mass spectrometry&nbsp;</strong></h5><p>Samples were analyzed on a <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/744"><strong>Thermo Scientific Vanquish Horizon UHPLC system</strong></a> coupled to the <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/2207"><strong>TSQ Certis MS</strong></a><strong> </strong>operated in selected reaction monitoring (SRM) mode. The mobile phase composition, analytical column details, LC gradient, and overlaid extracted ion chromatograms (EICs) are shown in Figure 3.&nbsp;</p><h5><strong>Data analysis&nbsp;</strong></h5><p>Data were acquired and processed using <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/77"><strong>Thermo Scientific TraceFinder software</strong></a> (v 5.2).</p><h4><strong>Conclusions&nbsp;</strong></h4><p>A sensitive and robust LC–MS/MS method was developed for simultaneous quantification of 18 steroids in human serum using the Vanquish Horizon UHPLC and TSQ Certis MS with OptaMax Plus ion source. The method demonstrated excellent linearity, accuracy, and reproducibility across a wide dynamic range. Optimization of MS conditions, particularly vaporizer temperature, significantly improved sensitivity. Overall, the workflow delivers high sensitivity, selectivity, and long-term stability, providing a reliable solution for high-throughput steroid analysis in clinical and research settings.</p><h3><strong>4. Waters Corporation: Alkaline-hydrolysis Method for PFAS in Textiles and Textiles Products by Xevo™ TQ-S micro with ACQUITY™ UPLC™ H-Class Plus System</strong></h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/720009443_en_0ab4914d72.pdf"><strong>Full PDF for download</strong></a></li></ul><div><div><section><div><div><div><div><div><div><h5><strong>Benefits&nbsp;</strong></h5><ul><li>Alkaline hydrolysis method (EN 17681-1:2025) used for preparing textiles, coated textiles and textile products for PFAS analysis allowed the inclusion of side-chain fluorinated polymers&nbsp;</li><li>Extraction method provided significant advantages in handling complex textile matrices by creating clear extracts free from dispersions, settleable solids and particulates&nbsp;</li><li>Protected the high-value LC-MS/MS components from potential damage&nbsp;</li><li>The method improved analytical sensitivity, reproducibility and accuracy, enabled cost-effective and timeefficient PFAS analysis maintained high analytical quality even for challenging high-matrix samples</li></ul><p>Many PFAS are linked to health concerns because of their ability to interfere with the body’s hormone systems, acting as endocrine disruptors also, linked to other toxic effects. Since textiles come into direct and prolonged contact with the skin, there is an increased risk of human exposure—especially for babies and children.4 In addition, PFAS pose significant environmental concerns. These “forever chemicals” do not readily break down and can be released during manufacturing, washing and disposal, allowing them to enter water pathways and persist in the environment. As a result, testing for PFAS has become increasingly important in the textile industry to demonstrate supply chain transparency, build consumer trust and protect brand reputation.</p><p>Synthetic fluorinated chemicals are categorized into two main groups - non-polymeric PFAS and polymeric PFAS, known for their use as water and grease repellent, heat resistant finishes in textiles, upholstery, leather, apparel, carpet and other industrial applications such as packaging, firefighting foams, non-stick cookware, etc. (Figure 1). PFAS are fluorinated substances contain at least one fully fluorinated methyl or methylene carbon atom (without any H/Cl/Br/I atom attached to it), i.e. with a few noted exceptions, any chemical with at least a perfluorinated methyl group or a perfluorinated methylene group.2 PFAS are classified as long chain and short chain based on their perfluorinated carbon chain length. Short chain fluorinated polymers encompasses a diverse range of chemistries, categorized according to their generic chemical and repeating units structures. Few examples are: derivatives of fluorotelomers, perfluoropolyethers with varying carbon chain lengths and acrylates, epoxylates, urethane, silicones of repeated units based structures.3 Polyfluoroalkyl substances such as fluorotelomer alcohols (FTOHs) contain C–H bonds, rendering them more susceptible to degradation. The ethoxylates in fluorotelomers-methacrylate break down to FTOH whereas polymeric fluorinated urethanes, acrylates break down to PFCAs (non-polymeric and polymeric side chain fluorinated polymers). In contrast, perfluoroalkyl substances such as PFOS and PFOA are extremely persistent due to their fully fluorinated carbon chains.&nbsp;</p><p>In alkaline hydrolysis methods, methanolic aqueous sodium hydroxide is used to break down precursor PFAS such as FTOHs, branched side chain PFAS. This process releases terminal perfluorinated carboxylic acids (PFCAs), which can then be measured. However, the efficiency of hydrolysis varies among different PFAS compounds and the presence of interfering substances such as organic matter or other chemicals in the sample matrix can inhibit the cleavage and detection of these analytes.</p><h4><strong>Experimental</strong></h4><ul><li><strong>LC system:</strong> <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/198"><strong>ACQUITY UPLC H-Class Plus System</strong></a> and SMFTN fitted with PFAS kit</li><li><strong>Column(s):</strong> <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/1823"><strong>XBridge™ BEH™ C18 5 µm Column</strong></a>, 4.6 x 100 mm&nbsp;</li><li><strong>MS system: </strong><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/products/209"><strong>Xevo TQ-S micro Mass Spectrometer</strong></a></li></ul><h4><strong>Conclusion&nbsp;</strong></h4><p>By strictly following the critical steps of the alkaline hydrolysis method using methanolic aqueous sodium hydroxide (NaOH) both freely extractable PFAS and those previously bound within side-chain fluorinated polymers such as esters linked to fluorotelomer alcohols (n:2 FTOHs, where n = 4, 6, 8, 10, 12), can be effectively extracted. This approach also safeguards the LC-MS/MS instrumentation from blockages, damage, or contamination by preventing polymer accumulation and matrix interferences.&nbsp;</p><p>The analytical method using the ACQUITY UPLC H-Class Plus System and Xevo TQ-S micro LC-MS/MS System was found to be sensitive, reproducible and accurate, enabling cost-effective and time-efficient PFAS analysis in chemically processed textiles, coated textiles and textile products whilst maintaining high analytical quality even for challenging high-matrix samples.</p></div></div></div></div></div></div></section></div></div>

News from LabRulezLCMS Library - Week 34, 2026

<p><strong>Our Library never stops expanding. What are the most recent contributions to LabRulezICPMS Library in the week of 17th August 2026? Check out new documents from the field of spectroscopy/spectrometry and related techniques!</strong></p><blockquote><p><span style="font-size:20px;">👉 </span><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library"><span style="font-size:20px;"><strong>SEARCH THE LARGEST REPOSITORY OF DOCUMENTS ABOUT SPECTROSCOPY/SPECTROMETRY RELATED TECHNIQUES</strong></span></a></p></blockquote><blockquote><p><strong>👉 Need info about different analytical techniques?</strong> Peek into <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library"><strong>LabRulezLCMS</strong></a> or <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library"><strong>LabRulezGCMS</strong></a> libraries.</p></blockquote><p>This week we bring you application notes by <strong>Agilent Technologies,</strong> <strong>Metrohm</strong>, and <strong>Shimadzu </strong>and other document by <strong>Thermo Fisher Scientific!</strong></p><h3><strong>1. Agilent Technologies: Direct Analysis of Seawater Using ICP-QQQ and Integrated Advanced Valve System</strong></h3><p><strong>Fast, robust environmental analyses using an </strong><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library?mainauthorItems=10&amp;search=9500"><strong>Agilent 9500 ICP-QQQ</strong></a><strong> with AVS MS&nbsp;</strong></p><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/labrulez-bucket-strapi-h3hsga3/an_seawater_9500_icp_qqq_5994_8988en_agilent_e56319c80a.pdf"><strong>Full PDF for download</strong></a><strong>&nbsp;</strong></li></ul><p>Trace elements in seawater play a vital role in marine biogeochemical cycles, influencing ocean productivity, ecosystem health, and global climate regulation.1,2 Although present at extremely low concentrations, many trace elements are essential for biological processes, while others, including heavy metals, serve as indicators of contamination from industrial activities and coastal development. Accurate determination of a wide range of elements is therefore critical for environmental monitoring, oceanographic research, and regulatory compliance. EPA Method 200.8 provides a widely adopted quality control (QC) framework for trace metal analysis in natural waters.3 However, seawater’s high salinity and major components such as Na, Mg, Cl, and S create analytical challenges for conventional ICP-MS analysis, including ionization suppression and polyatomic interferences, such as ArCl+ on As, ArNa+ on Cu, SO2 + on Zn. Overcoming these issues requires advanced interference removal techniques and high sensitivity. Triple quadrupole ICP-MS (ICP-QQQ) addresses these limitations through its MS/MS configuration.</p><p>Agilent ICP-MS/MS methods precisely control reaction chemistry and eliminate interferences, ensuring accurate quantification in complex saline matrices.&nbsp;</p><p>The Agilent 9500 Triple Quadrupole ICP-MS with its unique Dual-Cell System (DCS) enables accurate, efficient seawater analysis using enhanced collision/reaction cell (CRC) technologies. Its performance is primarily driven by Advanced Helium Mode (AHM). This advanced collision mode delivers exceptional on-mass interference removal using a combination of Kinetic Energy Discrimination (KED) and Collision Induced Dissociation (CID), ensuring precise quantification even in highly saline and complex matrices.4 Additionally, Air cell mode enables fast, effective mass-shift reactions, adding flexibility for overcoming challenging interferences.5 By seamlessly integrating AHM with Air cell mode, the 9500 simplifies workflows and delivers reliable results for trace analysis of multiple elements in seawater.</p><p>&nbsp;In this study, a <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library?mainauthorItems=10&amp;search=9500"><strong>9500 ICP-QQQ</strong></a> fitted with the AVS MS was used to quantify 26 elements in two seawater certified reference materials (CRMs) and a sample collected in Singapore, employing an online reverse-dilution approach. The method was assessed following the performance requirements of EPA Method 200.8.</p><h4><strong>Conclusion&nbsp;</strong></h4><p>Traditional seawater analysis by ICP‑MS often requires extensive sample preparation, such as dilution and matrix separation, to address high salinity and complex matrix effects. These additional steps increase both turnaround time and contamination risk. The method developed here enables direct seawater analysis using an online reverse-dilution approach, eliminating manual preparation and enabling rapid, high-throughput processing. Using the Agilent 9500 ICP-QQQ with AVS MS in online dilution mode, the workflow achieved ppt-level MDLs for 26 elements, excellent accuracy (90–110% recoveries for CRMs and spiked samples), and long-term stability across more than 130 analyses, meeting EPA Method 200.8 QC requirements.&nbsp;</p><p><strong>Key advantages of the 9500 ICP-QQQ method:&nbsp;</strong></p><ul><li><strong>Effective interference removal: </strong>Advanced gas modes (AHM and Air cell mode) controlled polyatomic species originating from the high-salinity matrices.&nbsp;</li><li><strong>High throughput:</strong> Automated online dilution and seamless gas-switching enabled complete analysis in 140 seconds per sample.&nbsp;</li><li><strong>Robust stability: </strong>Optimized rinse protocols ensured consistent ISTD recovery and instrument performance over a seven-hour run comprising 100 injections of undiluted seawater samples.&nbsp;</li></ul><p>This workflow delivers fast, reliable, and high-quality seawater analysis, making it ideal for environmental monitoring and marine research laboratories seeking maximum efficiency without compromising data integrity.</p><h3><strong>2. Metrohm: Moisture and protein content in corn starch with NIR spectroscopy</strong></h3><p><strong>Easily measure the quality of corn starch in seconds with NIR</strong></p><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/labrulez-bucket-strapi-h3hsga3/an_nir_151_download_087f0d33e0.pdf"><strong>Full PDF for download</strong></a></li></ul><p>Starch is a fundamental component in candy production where it is often used as a gelling agent and thickener. The confectionery industry uses it to create products with a certain consistency, like pie fillings. It is also used in a process known as starch molding where shapes are pressed into a corn starch bed for gummy candies and similar treats. Corn starch also acts as a desiccant during the candies' drying process before reuse. Therefore, the corn starch moisture content is a very important factor to consider in this process.&nbsp;</p><p>Near-infrared spectroscopy (NIRS) is a fast, chemicalfree analysis technique for the determination of moisture content and corn protein content in corn starch. The NIRS solution is easy to use and can be used either atline or in a quality control laboratory.</p><h4><strong>EXPERIMENTAL EQUIPMENT&nbsp;</strong></h4><p>210 samples of corn starch were measured with an <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library?mainauthorItems=220&amp;search=OMNIS+NIR"><strong>OMNIS NIR Analyzer Solid</strong></a> (Figure 1). All measurements were performed in reflection mode (1000–2250 nm) using a large holder and large cup (Table 1). OMNIS Software was used for all data acquisition and prediction model development. Karl Fischer titration was used to determine the water content in corn starch, and the Kjeldahl method was used to determine its protein content.</p><h4><strong>CONCLUSION</strong></h4><p>This Application Note shows the feasibility of using near-infrared spectroscopy for the determination of moisture and protein content in corn starch. Compared to the conventional analysis techniques used to determine these quality parameters, NIRS saves a considerable amount of time and costs. With NIR spectroscopy, analyses can be conducted without using any chemical reagents, giving users reliable results in seconds.</p><h3><strong>3. Shimadzu: Observation of Crack Propagation Process in Aluminum Alloy Specimen Using Air-Servo Microfocus X-Ray CT System</strong></h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/labrulez-bucket-strapi-h3hsga3/an_01_01152_en_de411e6e13.pdf"><strong>Full PDF for download</strong></a></li></ul><h5><strong>User benefits</strong></h5><ul><li>The Air-Servo Microfocus X-Ray CT System enables observation of crack propagation in three dimensions and over time.</li><li>Microfocus X-Ray CT system enables nondestructive observation of the interior of materials.</li><li>High-precision dynamic control is possible with the Servo Controller 4830.</li></ul><p>Many structural failures are caused by fatigue failure resulting from repeated loading. In fatigue failure, cracks initiate from microdefects in the material, internal voids, inclusions, and other features, and then propagate under repeated loading until final fracture occurs. To evaluate this sequence of processes, it is effective to observe defects and crack propagation nondestructively.&nbsp;</p><p>Traditionally, crack observation has focused on visual inspection and microscopic observation, but these methods are limited to information near the surface. To sufficiently capture the threedimensional shape and changes in cracks propagating inside a material, observation of the fractured specimen after failure has generally been used. In contrast, X-ray CT can nondestructively visualize internal defects and cracks in three dimensions, making it possible to evaluate in detail changes in crack morphology, including in the interior.&nbsp;</p><p>Accordingly, using the “Air-Servo Microfocus X-Ray CT System,” which combines X-ray CT with a fatigue testing machine, repeated tests were performed in which loading was stopped at fixed cycle intervals and imaging was carried out. This article introduces the resulting process of crack initiation and propagation in the same specimen.</p><h4><strong>Conclusion</strong></h4><p>Using the Air-Servo Microfocus X-Ray CT System, cracks propagating from the notch region of an aluminum alloy specimen were observed. First, static tests and fatigue tests were performed using the servo pulser EHF-LV, and a S-N diagram was obtained. Based on the obtained S-N diagram, the fatigue test conditions for the Air-Servo Microfocus X-Ray CT System were determined, and X-ray CT imaging was performed. The process of crack propagation according to the number of cycles was observed in cross-sectional images and 3D images. In addition, by visualizing the displacement from a specific cycle onward, it was also confirmed that the specimen necked down just before fracture.&nbsp;</p><p>Using the measurement system introduced in this article, it is possible to observe changes in specimen shape over time while the specimen remains mounted in the jig. Therefore, not only the crack propagation process of a specimen during fatigue testing, but also material deformation behavior and the process of shape change can be observed.</p><h3><strong>4. Thermo Fisher Scientific: IonicX Portable XRF Analyzer Device and Algorithm</strong></h3><p><strong>A detailed look into the algorithm used to authenticate ionic salts</strong></p><ul><li>Other document</li><li><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/labrulez-bucket-strapi-h3hsga3/ionicx_portable_xrf_analyzer_device_and_algorithm_an1649_en_6ffee8a584.pdf"><strong>Full PDF for download</strong></a></li></ul><p>The <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/products/2026"><strong>Thermo Scientific™ IonicX™ Portable XRF Analyzer</strong></a> utilizes Energy Dispersive X-ray Fluorescence (ED XRF) spectrometry to confidently differentiate between different chemical samples based on their atomic structure and the average atomic weight of the sample. The basic elements of XRF spectrometer systems include a radiation source, a sample, and an X-ray detector. The analysis relies on the interaction of radiation source output (an X-ray source) with a sample, in this case, the cup of ionic salt material, such as Sodium Chloride, Potassium Chloride, Sodium Hydroxide or other chemicals and salts. The XRF system can characterize materials, due to the fundamental principle that each element has a unique atomic structure, which in turn has a unique set of peaks (x-ray lines) in its emission spectrum. The energy dispersive X-ray detector separates (disperses) the detected radiation emitted from the sample by energy, thus providing a spectrum from which the different elements present in the sample can be identified and/ or quantified.</p><h4><strong>Algorithm&nbsp;</strong></h4><p>Handheld XRF devices often cannot detect elements lighter than Magnesium by their fluorescence lines, however many compounds contain elements of interest such as Oxygen and Hydrogen. Additionally, relying solely on primary fluorescence peaks to identify target compounds can lead to misinterpretation. For instance, if MgO and NaCl are present in a 1:1 mixture, the resulting XRF spectrum would display distinct characteristic Mg and Cl peaks. However, the sample would not actually be the spectrum of MgCl₂, as the analytical response of Mg and Cl would be very different in both samples because of a dilution effect and absorption from Na and O atoms. The XRF process can easily differentiate samples with similar elemental constituents but with different chemical structures by analyzing the resulting scatter from the sample and comparing the full spectrum to a calibration library of compounds. Figure 4 shows XRF spectra of Sodium Chlorate (NaClO₃) and Sodium Perchlorate (NaClO₄) taken with the IonicX XRF instrument. In this example, only the Cl fluorescence peak can be detected by the IonicX device as Na and O fluorescence X-rays have energies that are too weak to be detected. However, when the spectrum is normalized, in this case to the primary Compton peak of Ag Kα, a slight but distinguishable difference can be seen in the spectral intensity between the energies of 25 keV and 40 keV. The difference in the scatter of the X-ray tube Bremsstrahlung is caused by differences in mass absorption coefficients of the presented samples, in this case it is the extra O atom in the NaClO₄ molecule vs the NaClO₃ molecule.</p><h4><strong>Summary&nbsp;</strong></h4><p>The IonicX Portable XRF Analyzer is a powerful addition for the verification of ionic salt type chemicals, utilizing XRF technology in a versatile, easy to use, small form factor. IonicX provides clear, easy to understand, unambiguous results and tools to assist with compliance and data integrity. IonicX is a robust verification tool which allows pharmaceutical companies to more efficiently verify incoming chemicals that typically have been tested using lengthy wet-chemistry techniques.</p>

News from LabRulezICPMS Library - Week 34, 2026

<p><strong>Our Library never stops expanding. What are the most recent contributions to LabRulezGCMS Library in the week of 24th August 2026? Check out new documents from the field of the gas phase, especially GC and GC/MS techniques!</strong></p><blockquote><p><span style="font-size:20px;">👉 </span><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library"><span style="font-size:20px;"><strong>SEARCH THE LARGEST REPOSITORY OF DOCUMENTS ABOUT GCMS AND RELATED TECHNIQUES</strong></span></a></p></blockquote><blockquote><p><strong>👉 Need info about different analytical techniques?</strong> Peek into <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library"><strong>LabRulezLCMS</strong></a> or <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library"><strong>LabRulezICPMS</strong></a> libraries.</p></blockquote><p>This week we bring you application notes by <strong>Shimadzu, Thermo Fisher Scientific </strong>and <strong>Waters Corporation </strong>and poster by<strong> MDCW / GC Image!</strong></p><h3><strong>1. MDCW / GC Image: Alignment and Filtering Tools for Enhanced Differencing of Two-Dimensional Chromatograms</strong></h3><ul><li>Poster</li><li><a target="_blank" rel="noopener noreferrer" href="https://labrulez.com/pdf/P_21_Wu_3838638ea4.pdf"><strong>Full PDF for download</strong></a></li></ul><section><div><div><div><div><div><div><h5><strong>Challenges&nbsp;</strong></h5><p>Chromatogram-like visual differencing is intuitive, yet simple pixel-to-pixel subtraction often produces noisy artifacts, fails to correct retention-time shifts, and can obscure low-intensity but meaningful differences.&nbsp;</p><p>Previously, we developed comparative visualization methods [1] based on classic image-comparison techniques, including:&nbsp;</p><ul><li>Alignment with specialized color maps to visually highlight discrepancies between chromatograms&nbsp;</li><li>Interactive matching across two chromatograms [2], enabling both qualitative and quantitative side-by-side assessment at the individual-peak level&nbsp;</li></ul><p>We extend this work by presenting a more robust chromatogram differencing visualization method designed to overcome these limitations</p><h4><strong>Example 1: Alignment for Data Fusion (FID vs MS)&nbsp;</strong></h4><ul><li><strong>Data Set:</strong> GCxGC data of a diesel fuel sample&nbsp;</li><li><strong>Instruments:</strong> <a target="_blank" rel="noopener noreferrer" href="https://labrulez.com/en-us/gcms/library?mainauthorItems=10&amp;search=7890A"><strong>Agilent 7890A GC</strong></a>/InfoMass L10 thermal modulator/Hexin TOFMS<ul><li><strong>Detectors:</strong> FID (350 C, 200 Hz), MS (45-450 m/z, 50 Hz)&nbsp;</li><li><strong>Modulation:</strong> 6 seconds with programmable cold jet gas flow (15L/min to 6 L/min)</li></ul></li></ul><h4><strong>Example 2: Differencing (GC×GC-MS)&nbsp;</strong></h4><ul><li><strong>Data Set: </strong>GCxGC-TOFMS data set of different dark chocolates [3].</li><li><strong>Instruments: </strong><a target="_blank" rel="noopener noreferrer" href="https://labrulez.com/en-us/gcms/library?mainauthorItems=23&amp;search=AccuTof"><strong>JEOL AccuTof GC mass spectrometer</strong></a> with an <a target="_blank" rel="noopener noreferrer" href="https://labrulez.com/en-us/gcms/library?mainauthorItems=10&amp;search=7890"><strong>Agilent 7890 GC</strong></a></li></ul><h4><strong>Example 3: Differencing with BPC (LC×LC-MS)&nbsp;</strong></h4><ul><li><strong>Data Set:</strong> LCxLC-MS data of different types of beer [4].&nbsp;</li><li><strong>Instruments: </strong><a target="_blank" rel="noopener noreferrer" href="https://labrulez.com/en-us/lcms/library?mainauthorItems=10&amp;search=1290+infinity+2D-LC"><strong>Agilent 1290 Infinity 2D-LC</strong></a> solution coupled with an <a target="_blank" rel="noopener noreferrer" href="https://labrulez.com/en-us/lcms/library?mainauthorItems=10&amp;search=6530"><strong>Agilent 6530 Accurate-Mass Q-TOF LC/MS system</strong></a></li></ul><h3><strong>2. Shimadzu: Comprehensive and High-Sensitivity Analysis of Food Aroma by Simultaneous Scan/MRM Measurement Using Triple Quadrupole GC-MS/MS</strong></h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://labrulez.com/pdf/an_01_01269_en_657ee319e0.pdf"><strong>Full PDF for download</strong></a></li></ul><h4><strong>User benefits</strong></h4><ul><li>Simultaneous scan/MRM measurement enables comprehensive search by scan measurement and high-sensitivity analysis of trace aroma compounds by MRM in a single measurement.&nbsp;</li><li>With LabSolutions Insight Explore GCMS, deconvolution analysis of scan data and target analysis of MRM data are possible in a single software program.&nbsp;</li><li>The Multi-Mode Injection Unit (MMI), which allows rapid heating, supports aroma analysis in the thermal desorption (TD) mode</li></ul><p>The “aroma” of food products and beverages is a key factor that largely determines product quality and consumer preferences, and thus is an extremely important element in product development and quality control. Since the gas chromatograph mass spectrometer (GC-MS) provides excellent performance in qualitative analysis of volatile compounds, it is used to measure various aroma components that make up an odor. However, due to the diversity of aroma compounds and their wide concentration range, which extends from the ppm to the ppt order, an analytical method that allows efficient measurement of these substances is demanded.&nbsp;</p><p>Non-targeted analysis by scan measurement is an effective tool for comprehensive profiling, but in many cases, it is difficult to identify the trace components that make a significant contribution to aroma due to the limits of instrument sensitivity and matrix interference. On the other hand, although widetarget analysis by the MRM (Multiple Reaction Monitoring) mode using GC-MS/MS offers high sensitivity and selectivity for several hundred target components, MRM lacks a search capability for unknown components.</p><p>Therefore, this Application News article reports a technique that satisfies both comprehensive non-targeted search and highsensitivity detection of trace components in a single analysis by combining the <a target="_blank" rel="noopener noreferrer" href="https://labrulez.com/en-us/gcms/library?mainauthorItems=1&amp;search=8040+RX"><strong>GCMS-TQ 8040 RX</strong></a>, which supports simultaneous data acquisition in simultaneous multi-component analysis measurements by scan measurement and the MRM mode, and the Smart Aroma Database for use in aroma analysis. In addition, in this experiment, the thermal desorption (TD) mode of the Multi-Mode Injection Unit (MMI) was adopted for sample introduction. This enablesintroduction of componentstapped on the adsorbent without using a dedicated TD device, thereby achieving a simplified system configuration.</p><h4><strong>Conclusion&nbsp;</strong></h4><p>This Application News article showed that it is possible to achieve both a comprehensive non-targeted analysis of food aroma and a high-sensitivity wide-target analysis of trace components in a single analysis, without carrying out complicated operations, by simultaneous scan/MRM measurement combining the GCMSTQ8040 RX and the Smart Aroma Database. This article also demonstrated that use of the Multi-Mode Injection Unit (MMI) enables measurements in the thermal desorption (TD) mode without using dedicated TD instrumentation, and also allows a flexible response in case of budgetary or installation space limitations. A comprehensive aroma evaluation based on this approach will facilitate the discovery of important aroma components that were easily overlooked in the past, and is expected to make important contributions to product development and quality control in the food and beverage industries.</p><h3><strong>3. Thermo Fisher Scientific: Implementing EPA OTM-50 for PFAS destruction monitoring by TD-GC-MS/MS</strong></h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://labrulez.com/pdf/an_004773_gc_td_gc_ms_epa_otm_50_pfas_an04773_na_en_99fd5fc528.pdf"><strong>Full PDF for download</strong></a></li></ul><p>Per- and polyfluoroalkyl substances are used across a broad range of industrial and consumer applications. As PFAS-containing materials are treated or destroyed, incomplete decomposition can generate volatile fluorinated compounds, including short-chain and ultra-volatile species. These volatile compounds are important because they may provide evidence of incomplete mineralization once emitted from stationary sources.</p><p>EPA OTM-50 was developed to provide a consistent approach for collecting and quantitatively analyzing target VFCs from emissions originating from known industrial products with incomplete thermal destruction. The EPA method uses passivated stainlesssteel canisters followed by GC-MS analysis and is applicable to gas samples collected from industrial source ducts, vents, stacks, and related emission points.&nbsp;</p><p>The method is performance-based, allowing laboratories flexibility in GC column selection, GC conditions, and MS conditions, provided that GC-MS remains the basis for separation and quantitation and the required performance criteria are met. This flexibility is important because OTM-50 analytes span a challenging volatility range and may occur in complex matrices containing CO2 , water vapor, acid gases, and other volatile organic compounds.&nbsp;</p><p>Gas chromatography-based approaches are well suited to volatile and neutral fluorinated compounds. Thermal desorption enables preconcentration of trace-level analytes from air samples, improving sensitivity and enabling detection at relevant levels for environmental studies.&nbsp;</p><p>This application note describes implementation of EPA OTM-50 using cryogen-free thermal desorption coupled to triple quadrupole GC-MS/MS. The workflow addresses key analytical challenges: trapping ultra-volatile compounds such as CF4 , managing high levels of CO2 and humidity, achieving sub-ppbv sensitivity, and maintaining repeatable quantitative performance in support of PFAS destruction monitoring.</p><h4><strong>Experimental&nbsp;</strong></h4><h5><strong>Instrument configuration&nbsp;</strong></h5><p>The analytical system consisted of a <a target="_blank" rel="noopener noreferrer" href="https://labrulez.com/en-us/gcms/library?mainauthorItems=6&amp;search=UNITY-Kori-CIA"><strong>Markes UNITY</strong></a><strong>-Kori-CIA Advantage HL-xr thermal desorption system</strong> coupled to a <a target="_blank" rel="noopener noreferrer" href="https://labrulez.com/en-us/all/products/485"><strong>TSQ 9610 Triple Quadrupole GC-MS/MS</strong></a> equipped with a <a target="_blank" rel="noopener noreferrer" href="https://labrulez.com/en-us/gcms/library?mainauthorItems=3&amp;search=nevervent"><strong>Thermo Scientific™ NeverVent™ AEI Ion Source</strong></a> (Figure 1). The Markes thermal desorber configuration included cryogen-free focusing, controlled canister introduction, and water and CO2 management strategies.</p><h4><strong>Conclusions&nbsp;</strong></h4><p>This work demonstrates implementation of EPA OTM-50 using thermal desorption coupled to triple quadrupole GC-MS/MS for the analysis of volatile fluorinated compounds in air, with solutions helping to solve key analytical challenges for this type of analysis.&nbsp;</p><ul><li><strong>Alignment with EPA OTM-50 scope:</strong> supports canisterbased analysis of VFCs emitted from stationary sources, including compounds associated with incomplete PFAS destruction.&nbsp;</li><li><strong>Cryogen-free preconcentration:</strong> enables practical trapping and transfer of volatile analytes without reliance on liquid cryogens, reducing operational complexity.&nbsp;</li><li><strong>Improved selectivity through MS/MS: </strong>SRM acquisition on the TSQ 9610 Triple Quadrupole GC-MS/MS improves confidence in target identification and quantitation in complex emission matrices.&nbsp;</li><li><strong>Dual-method strategy for broad volatility coverage:</strong> separate sample volumes for CF4 and the remaining VFCs enable analysis across the challenging OTM-50 volatility range.&nbsp;</li><li><strong>CO2 and humidity management:</strong> controlled dilution, selective trap purging, and Kori-xr water management address two of the most significant matrix challenges in stationary source emissions.&nbsp;</li><li><strong>Robust quantitative performance: </strong>calibration across 0.1–100 ppbv (0.125–50 ppbv for CF4 ) showed R2 ≥ 0.998 for reported compounds or &lt; 20% RSD for Average Response Factor, with pptv MDLs and repeatability generally consistent with OTM-50 precision expectations.&nbsp;</li><li><strong>Industrial relevance: </strong>the workflow supports chemical manufacturing, PFAS treatment, and waste management facilities seeking defensible data to evaluate destruction efficiency and identify products of incomplete destruction.&nbsp;</li></ul><p>Overall, the combination of Markes thermal desorption technology with the Thermo Scientific TSQ 9610 Triple Quadrupole GC-MS/MS provides a practical, selective, and robust analytical approach for laboratories implementing EPA OTM-50 for volatile PFAS and VFC monitoring in air.</p><h3><strong>4. Waters Corporation: Analysis of Polybrominated Diphenyl Ether Flame Retardants in Environmental Matrices Using Atmospheric Pressure Chemical Ionization GC-MS/MS</strong></h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://labrulez.com/pdf/720009524_en_58a948f96a.pdf"><strong>Full PDF for download</strong></a></li></ul><h4><strong>Benefits&nbsp;</strong></h4><ul><li>The performance of atmospheric pressure gas chromatography (APGC ™) on Xevo™ TQ Absolute Mass Spectrometer for the analysis of PBDEs is equal-to or better-than traditional analysis using electron impact magnetic sector making it well suited for use in the most challenging regulatory and standard methods.</li><li>The ability of APGC to tolerate high carrier gas flow helps improve method performance for the most challenging members of this class inlcuding BDE 209 which reduces the need for maintenance and reanalysis of samples.</li><li>Operator training is reduced to weeks from months through conversion of the method from a magnetic sector to tandem quadrupole mass spectrometer.</li><li>Use of a single, inexpensive, readily available gas for chromatographic separation, ionization and MS/MS fragmentation provides a simpler, more sustainable system.</li></ul><p>With the 2001 signing of the Stockholm Convention, the stage was set for global harmonization of efforts to monitor for POPs in the environment.1 By 2004, when countries began implementing the convention, measures aimed at reducing or eliminating intentional and unintentional release of POPs into the environment were supported by annexes that defined the different chemical classes of highest interest which included PBDEs. To date, 185 states plus the European Union have joined in this effort which includes requirements for monitoring for POPs in multiple environmental matrices. Because the implications of unintentional or intentional noncompliance may be subject to enforcement action, high confidence data is needed to support surveillance and reporting efforts. Furthermore, high sensitivity analysis is required due to the possibility of steadily increasing trace levels of PBDEs across years of time through transport in the environment that tends to increase concentrations of persistent organic pollutants such as these in cooler Arctic regions of the globe through the grasshopper effect.2 These requirements initially led to the development of gas chromatography electron ionization high resolution magnetic sector based analytical methods. The performance of EI GC-HRMS in the hands of a well-trained operator and a lab with rigorous quality control procedures has proven to provide the sensitivity and specificity required of the forensic data used in legal actions, for compliance reporting and for providing the greatest protection to populations and the environment.&nbsp;</p><p>However, GC-HRMS has several limitations, including extensive education and training requirements, slow acquisition speeds, and significant laboratory space demands. In contrast, more modern techniques such as tandem quadrupole (TQ) mass spectrometry (MS/MS) offer broad improvements in these areas. Additionally, limitations imposed by EI such as frequent source maintenance and shortcomings caused by carrier gases other than helium hamper this time-honored technique. The more recent combination of APCI with TQ has demonstrated promise in overcoming these limitations while providing data of equivalent confidence to EI GCHRMS.&nbsp;</p><p>After having been deployed in many labs, GC-APCI has continued to contribute to the study of PBDEs in multiple matrices and applications. An evaluation of the first generation of GC-APCI MS/MS, analyzing PBDEs in marine and food samples, reported higher response for higher brominated (Br8-10) congeners than GC-EI-HRMS.3 Later work reported GC-APCI MS/MS LODs comparable or better than EI MS/MS for plasma extracts.4 Recent work reported on the use of GC-APCI HRMS (QTof) as part of the continuation of a 20 year study analyzing aquatic organisms to evaluate environmental PBDE trends.5 In this work, 24 PBDEs plus hexabromobiphenyl were analyzed on a XevoTM TQ Absolute Tandem Quadrupole Mass Spectrometer using the APGC ionization source.</p><h4><strong>Experimental</strong></h4><ul><li><strong>GC system: </strong><a target="_blank" rel="noopener noreferrer" href="https://labrulez.com/en-us/gcms/library?mainauthorItems=10&amp;search=8890"><strong>8890 (Agilent Technologies, Inc.)&nbsp;</strong></a></li><li><strong>Column: </strong>Rtx®-1614, 15 m x 0.25 mm ID x 0.10 µm film (Restek Corporation)</li><li><strong>MS system: </strong><a target="_blank" rel="noopener noreferrer" href="https://labrulez.com/en-us/all/products/554"><strong>Xevo TQ Absolute Mass Spectrometer</strong></a></li><li><strong>Software: </strong><a target="_blank" rel="noopener noreferrer" href="https://labrulez.com/en-us/all/products/1544"><strong>waters_connect™</strong></a> for Quantitation Software</li></ul><h4><strong>Conclusions&nbsp;</strong></h4><p>An all-nitrogen configuration for APGC on Xevo TQ Absolute Mass Spectrometer was successfully applied to the analysis of PBDEs in environmental matrices by adapting a reference method previously used on magnetic sector EI GC-HRMS. All performance criteria were equal-to or better-than those typically achieved by magnetic sector which demonstrates feasibility of GC-APCI MS/MS as an alternative for the most challenging regulatory and standard analytical methods. Furthermore, the change from a vacuum source to the atmospheric ionization source makes the use of high nitrogen carrier gas flow practical which has advantages for operating cost versus helium while achieving similar chromatographic separation and sensitivity. The move to tandem quadrupole mass spectrometry from high resolution mass spectrometry updates the method for improved performance measures such as higher acquisition speeds and high specificity MS/MS while also requiring reduced training time and expertise as compared with magnetic sectors.</p></div></div></div></div></div></div></section>

News from LabRulezGCMS Library - Week 35, 2026

News from LabRulezLCMS Library - Week 35, 2026

News from LabRulezICPMS Library - Week 35, 2026

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Thermo Fisher Scientific

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LabRulez

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LECO

European Symposium on Analytical Spectrometry (ESAS) 2026

2026 AOAC INTERNATIONAL Annual Meeting & Exposition

Shimadzu at 2026 AOAC Annual Meeting & Exposition

ICP-MS for Hybrid Photoelectrode Characterization

Modern Methods for Faster Microbial Analysis

Addressing LC Method Optimization - Scaling For Efficiency, Throughput And Reproducibility