<p><strong>Our Library never stops expanding. What are the most recent contributions to LabRulezGCMS Library in the week of 15th September 2025? 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 posters by <strong>Agilent Technologies / ASMS, Shimadzu / ASMS </strong>and application note by <strong>EST Analytical!</strong></p><h3><strong>1. Agilent Technologies / ASMS: Beyond Aligners: Unmasking Hidden Extractables and Leachables in Orthodontic Devices</strong></h3><ul><li>Poster</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/ps_7250_extractables_leachables_asms_2025_tp_318_en_ucsf_3e88cfbf5c.pdf"><strong>Full PDF for download</strong></a></li></ul><p>Increasingly popular in orthodontics, clear aligners promised to users’ improved comfort, compliance and flexibility. It also came with prolonged intraoral exposure. The literature on the potential for leaching components of the polymer used to manufacture the invisible aligners is sparse. Despite the benefits, user submitted cases in the FDA retrospective analysis report several adverse effect ranging from swelling, hives, itchiness and even difficulty breathing1 . Previous works examined the potential of leaching in retainers but used conditions far from the in-vivo setting2 . We used samples closest to user conditions and harnessed the power of Gas Chromatography High Resolution Mass Spectrometry (GC-HRMS) and the power of curated and annotated libraries to find candidate compounds that could be at the origin of the reported adverse effects. We also used multivariate statistics to establish relationships between the compounds and metadata.</p><h4><strong>Experimental</strong></h4><h5><strong>Sample Analysis&nbsp;</strong></h5><p>Samples were analyzed using the <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?manufacturerItems=1&amp;search=7250"><strong>Agilent 7250 accurate mass GC-qTOF</strong></a> equipped with the <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?manufacturerItems=1&amp;search=8890+GC"><strong>8890 GC</strong></a> and a DB-5MS UI column (30m x 0.25 x 0.25). The inlet temperature was 280°C and the transfer line temperature was 325°C. The oven program was as follows: 50°C for 1 min, ramp at 25°C to 170°C, hold for 1 min; then ramp at 15°C to 300°C, hold for 10 min; then ramp at 20 °C to 325°C and hold for 5 min. The solvent delay was 4 min. The data were acquired in electron ionization (EI) mode using mass range 45 to 1000 m/z. The source temperature was 230°C, and the emission current was 5 µA. A mix of alkanes was run along with the samples and blanks and an Extractables and Leachables (E&amp;L) standard mixture was run as a quality check.&nbsp;</p><h5><strong>Data Analysis&nbsp;</strong></h5><p>Retention indices were used in consolidating library matches in both the Agilent HRMS E&amp;L library and the NIST23 library. Data analysis was conducted on Unknown Analysis software from Agilent that performs compound annotation based on library matching and retention index. All compounds were individually reviewed based on ExactMass, retention index delta and library match factor (Figure 2). Canonical Correlation Analysis was performed using the FactoMineR package in R.</p><h4><strong>Conclusions</strong></h4><p>The aligners used in the current study were approved in the late 90s when E&amp;Ls methods were not as prominent or sensitive as they are today. This study stands out with:&nbsp;</p><ul><li>The first report of numerous E&amp;L compounds with known potential adverse effects in a population of clear aligner users&nbsp;</li><li>Providing an insight of the relationships between E&amp;Ls and user’s metadata such as age, DWT and TSS&nbsp;</li><li>Providing the necessary libraries to find parent compounds and their potential metabolites</li></ul><h3><strong>2. EST Analytical: Optimization of 1,4-Dioxane and Ethanol Detection Using USEPA Method 8260</strong></h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/Purge_and_Trap_1_4_Dioxane_and_Ethanol_by_8260_App_Note_b669c79f53.pdf"><strong>Full PDF for download</strong></a></li></ul><p>During the manufacture of pharmaceuticals, 1, 4-Dioxane is used as a cleansing agent. It is also a byproduct of plastic manufacturing. The most likely exposure to 1, 4-Dioxane is at an industrial site. However, if any 1, 4-Dioxane is released into the environment during manufacturing there is a potential for it to migrate into ground water. The fact that 1, 4-Dioxane is so miscible in water makes degradation of the chemical challenging. Ethanol, on the other hand, has been a popular gasoline additive. Since it burns more quickly and completely than gasoline, emissions from car exhaust are decreased. The downside of this is underground storage tank leakage and fuel spills cause ground water and drinking water to be contaminated with both the fuel and the ethanol additive. Since ethanol is also very miscible in water, the detection of ethanol contamination in water can be difficult.&nbsp;</p><p>There have been several innovations that help overcome the obstacles of detecting 1, 4-Dioxane and Ethanol. The first one is the SIM mode of the mass spectrometer. This mode allows better detection of hard to extract compounds. Furthermore, mass spectrometers are now equipped to run SIM/Scan, this not only helps detect more difficult compounds, but also enables the detection of an extensive list of USEPA Method 8260 compounds without having to run the samples twice. Advancements in purge and trap sampling have also facilitated better detection of these compounds. Most effective in this has been the ability to heat the samples. However, there are drawbacks to better detection. The most problematic of these is the tendency of 1, 4-Dioxane and Ethanol to “stick” to the glass ware. This susceptibility has caused many headaches in environmental labs.&nbsp;</p><p>This application note will investigate seven variations of purge and trap sampling. The data will then be evaluated in order to recommend the optimum purge and trap sampling parameters for your lab.</p><h4><strong>Experimental</strong></h4><p>The sampling system used for this study was the <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/2160"><strong>EST Analytical Evolution concentrator</strong></a> affixed with a Vocarb 3000 trap. The <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/2159"><strong>Centurion WS autosampler</strong></a> equipped with the syringe option was employed as the autosampler. The separation and analysis were performed by an <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?manufacturerItems=1&amp;search=7890A"><strong>Agilent 7890A Gas Chromatograph (GC)</strong></a> and <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?manufacturerItems=1&amp;search=5975C"><strong>5975C inert XL Mass Spectrometer (MS)</strong></a>. The GC was configured with a <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?manufacturerItems=9&amp;search=Rxi-624+Sil+MS"><strong>Restek Rxi-624 Sil MS</strong></a> 30m x 0.25mm x 1.4µm column. The purge and trap parameters used for this study are listed in Tables 1 and 2 while Table 3 shows the GC/MS parameters.</p><h4><strong>Conclusions</strong></h4><p>All seven purge and trap parameter iterations passed the USEPA Method 8260 requirements for linearity and method detection limits. The problem with some of the experimental parameters was found in the carryover and precision and accuracy studies. The carryover using the traditional sparge vessel showed a large amount of carryover for the Ethanol and 1, 4-Dioxane. Since the carryover was so high, the precision and accuracy data suffered. The Fritless/Bulbless sparge vessel, on the other hand, displayed much lower carryover for the Ethanol and 1, 4-Dioxane especially when the patented sparge bake was not used. However, the 1, 2, 4-Trichlorobenzene, Naphthalene and 1, 2, 3-Trichlorobenzene carryover after the 50ppb standard was above the lower limit of the curve. Thus, the sparge bake would be recommended in order to limit the carryover of the heavier compounds. The optimum purge and trap parameters proved to be the patented water extraction technique. This technique provided linearity and method detection limits that met the USEPA Method 8260 requirements, while providing excellent precision and accuracy data. During water extraction, the sample is transferred to an empty 40ml vial and then purged in the soil station of the Centurion. The “fresh” vial provides a clean sparge vessel for every sample thus limiting carryover for both the Ethanol and 1, 4-Dioxane and for the heavy compounds. This lack of carryover aided in providing optimum precision and accuracy and carryover results and would be the recommended method for examining these troublesome compounds.</p><h3><strong>3. Shimadzu / ASMS: Quantitation of Acetaldehyde, Ethylene Oxide, 2-Chloroethanol, Ethylene Glycol, 1,4-Dioxane &amp; Diethylene Glycol in PEG 3350 by using dynamic headspace GC-MS/MS</strong></h3><ul><li>Poster</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/ASMS_2025_TP_301_ad1ab4ac3e.pdf"><strong>Full PDF for download</strong></a></li></ul><p>Polyethylene glycol 3350 (PEG 3350) is used to treat occasional constipation and it is in a class of medications called osmotic laxatives. PEG 3350 is an addition polymer of ethylene oxide and water with formula H(OCH2CH2)n OH, in which n represents the average number of oxyethylene groups. The average molecular weight of PEG 3350 is 3015–3685 g/mol (Da). Acetaldehyde, Ethylene Oxide (EtO), 2-Chloroethanol (2-CE), Ethylene Glycol (EG), 1,4- Dioxane and Diethylene Glycol (DEG) are the probable impurities of PEG 3350. All these above impurities are highly toxic &amp; hazardous substances.&nbsp;</p><p>As per the USP monograph, different chromatography techniques and sample preparation methods are used to quantify above mentioned impurities. This study reports a single sensitive and reliable analytical method for quantitation of all above impurities by using dynamic headspace (Trap) coupled with GC-MS/MS system. Limit of impurities and detail method of analysis are shown in table 1.</p><p>This study reports highly sensitive single method for the simultaneous quantification of multiple probable impurities of PEG 3350 by using dynamic headspace (Trap) coupled with triple quadrupole gas chromatography (GC-MS/MS) system.&nbsp;</p><h4><strong>Materials and methods&nbsp;</strong></h4><p>For this study, individual impurity reference standards were procured from Sigma Aldrich, whereas PEG 3350 powder sample was procured from local medical store. 10% of PEG 3350 powder sample solution (as such sample solution) and respective levels of matrixmatched calibration standard solutions were prepared in acetonitrile. Standard addition method was used to quantify impurities in the PEG 3350 sample. This method was part validated with respect to (w.r.t) precision, linearity/accuracy and sample analysis. <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?manufacturerItems=3&amp;search=GCMS-TQ8050+NX"><strong>GCMS-TQ8050 NX</strong></a> equipped with headspace sampler <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?manufacturerItems=3&amp;search=HS-20+NX"><strong>HS-20 NX </strong></a>(Trap) (Figure 1), manufactured by Shimadzu Corporation Japan, was used to quantify impurities in the PEG 3350 sample</p><h4><strong>Conclusion</strong></h4><ul><li>Trace level quantification of Acetaldehyde, EtO, 2-CE, 1,4-Dioxane, EG and DEG in PEG 3350 sample was successfully performed by using Shimadzu GCMS-TQ8050 NX with HS-20 NX (Trap) dynamic headspace sampler.</li><li>Dynamic headspace mode outperforms the current regulatory limits, delivering multifold times more sensitivity compared to other injection techniques.</li><li>Shimadzu GCMS-TQ8050 NX features a new highly efficient detector and superior noise reduction technology that enhance sensitivity and enables quantitation of impurities even at trace levels.</li></ul>

News from LabRulezGCMS Library - Week 38, 2025

<p><strong>Our Library never stops expanding. What are the most recent contributions to LabRulezGCMS Library in the week of 8th December 2025? 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>Agilent Technologies </strong>and<strong> Thermo Fisher Scientific </strong>and other document by<strong> Shimadzu!</strong></p><h3><strong>1. Agilent Technologies: High-Precision Determination of Four Greenhouse Gases in the Atmosphere Using the Agilent 8890 GC</strong></h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/an_monitoring_greenhouse_gas_8890_gc_5994_8744en_agilent_0e08f0909f.pdf"><strong>Full PDF for download</strong></a></li></ul><p>Currently, China is actively implementing dual-control measures on total energy consumption and intensity. The Ministry of Ecology and Environment issued "The 14th Five-Year Plan for Ecological and Environmental Monitoring", which specifically highlights the advancement of technologies for direct measurement of carbon emissions. It calls for organizing pilot projects in multiple key industries and enterprises to monitor greenhouse gas emissions such as carbon dioxide and methane, establishing greenhouse gas monitoring networks in key cities, and upgrading the greenhouse gas monitoring capabilities of national atmospheric background stations. As a result, conducting greenhouse gas monitoring within the environmental protection stations of provinces and cities has become a critical task.</p><p>The use of GC for detecting greenhouse gases has a long history. The conventional methods used gas sampling valve for injection, TCD and FID for sequential detection of CO<sub>2</sub> and CH<sub>4</sub> , or combining a methanizer with an FID to detect CO<sub>2</sub> and CH<sub>4</sub> in one analytical channel and detecting N<sub>2</sub>O on ECD in another analytical channel.<sup>2</sup> The analytical precision for CO<sub>2</sub>, CH<sub>4</sub>, and N2 O achieved with such configurations typically ranges from 0.2% to 0.5%, but it is difficult to obtain precision better than 0.1%, which does not meet the current requirements for greenhouse gas monitoring accuracy and precision. Moreover, the traditional methods rarely report analytical precision for SF<sub>6</sub> at ppt concentration levels. To monitor trace levels of CO<sub>2</sub> , CH<sub>4</sub>, N<sub>2</sub>O, and ultratrace levels of SF<sub>6</sub> on the same GC system with high-precision results, it is necessary to optimize multiple factors included in sample injection, separation, and detection. Furthermore, the system configuration must be flexible enough to allow expansion for future analytical needs, such as incorporating trace CO analysis in air. This work demonstrates how the 8890&nbsp;GC achieves high-precision analysis of four key greenhouse gases by optimizing the injection volume, controlling injection reproducibility, and utilizing multichannel separation and high-sensitivity detectors to ensure the system runs stably in long‑term operation.</p><h4><strong>Experimental</strong></h4><h5><strong>Instrumental&nbsp;</strong></h5><p>The <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?manufacturerItems=1&amp;search=8890+GC"><strong>8890 GC</strong></a> is configured as a three-channel/multivalve/multicolumn system, enabling independent analysis of four greenhouse gases—CH<sub>4</sub> , CO<sub>2</sub> , N<sub>2</sub>O, and SF<sub>6</sub> —within 8 minutes using a single injection. The target compounds are analyzed in separate channels, reducing chromatographic peak broadening and thereby improving sensitivity and&nbsp;repeatability.&nbsp;</p><ul><li>For CO<sub>2</sub> analysis, a <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?manufacturerItems=1&amp;search=methanizer"><strong>methanizer</strong></a> is used to convert CO<sub>2</sub> to CH<sub>4</sub> , which is then detected by FID. The system eliminates the need for dehydration through backflushing and venting operation via switching valves, preventing interference from moisture and oxygen in the air and extending the lifespan of the methanizer.&nbsp;</li><li>For N<sub>2</sub>O and SF<sub>6</sub> analysis, the ECD with hidden anode design is used for high‑sensitivity detection and strong anti‑contaminant capability.&nbsp;</li><li>The CH<sub>4</sub> analysis is conducted on a single column with a dedicated large injection loop, significantly enhancing detection sensitivity and repeatability, achieving a detection limit for methane as low as single-digit ppb levels.</li></ul><h4><strong>Conclusion&nbsp;</strong></h4><p>Based on its exceptional pneumatic control and valve-based flow path design, the multivalve/multicolumn Agilent 8890 GC system achieves high-sensitivity and high-precision measurements of four key greenhouse gases. This is accomplished through optimized and precise control of sample flow rate/volume, selection of premium analytical columns, and the use of highly stable and robust FID and ECD. Standard gas samples of CO2 , CH4 , N2 O, and SF6 , with concentrations equivalent to atmospheric levels, were measured continuously 10 times. The measurement precision for these gases was better than 0.05%, 0.1%, 0.1%, and 0.5%, respectively, fully meeting the high-precision monitoring requirements of environmental monitoring stations at various levels for target greenhouse gases. Compared to other monitoring solutions, this approach is based on a stable and reliable gas chromatography platform that is technically easier to master and deploy. It represents a trusted solution developed by Agilent to assist in establishing a greenhouse gas monitoring network in China.</p><h3><strong>2. Shimadzu: GC/MS Mass Spectra Library - Polymer Additives Library Ver.2</strong></h3><ul><li>Other document</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/c146_e506_d4c93c4d60.pdf"><strong>Full PDF for download</strong></a></li></ul><h4><strong>Contains Approximately 5,800 Mass Spectra&nbsp;</strong></h4><p>This library consists of a library*, which contains 5,775 mass spectra for 590 types of polymer additives and GC/MS pyrolysates from the pyrolysis GC/MS analysis of additives, and a library containing the mass spectra for 65 compounds often targeted for analysis, selected based on their usage in the commercial market, and chemical substance regulatory information. In total, this product contains 5,840 mass spectra, which provides strong support for the analysis of polymer additives. In Ver.2, the compound registration has been newly enhanced, for example vulcanizing accelerators utilized in the rubber filed. Approximately 1,000 spectra have been added.&nbsp;</p><p><i>*ADD-MS22B F-Search Additives Library from Frontier Laboratories</i></p><h4><strong>Can Be Used with a Variety of GC/MS Systems&nbsp;</strong></h4><p>The library can be used for a variety of GC/MS applications, including pyrolysis GC/MS, which is widely used for the analysis of additives in polymer materials, and liquid sample injection GC/MS. It supports a wide range of additive analysis for customers.</p><h4><strong>Library Specifications</strong></h4><ul><li><strong>Registered compounds:</strong> 5,775+65&nbsp;</li><li><strong>Registered information:</strong> Mass spectrum, retention index for each analytical condition, compound name, molecular weight, compositional formula, structural formula, classification of additives</li><li><strong>Applicable models:</strong> <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?manufacturerItems=3&amp;search=GCMS-QP2050"><strong>GCMS-QP™ serie</strong></a>s, <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?manufacturerItems=3&amp;search=GCMS-TQ8050"><strong>GCMS-TQ™ series</strong></a> (This library does not include MS/MS spectra.)&nbsp;</li><li><strong>Pyrolyzer</strong> (Pyrolysis analysis system): <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?manufacturerItems=43&amp;search=PY-2020D"><strong>PY-2020D</strong></a>, <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?manufacturerItems=43&amp;search=PY-2020iD"><strong>PY-2020iD</strong></a>, and <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?manufacturerItems=43&amp;search=EGA%2FPY-3030D"><strong>EGA/PY-3030D</strong></a></li><li><strong>Workstations:</strong> <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?manufacturerItems=3&amp;search=GCMSsolution"><strong>GCMSsolution</strong></a>™ Ver. 4.6 and later, <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?manufacturerItems=3&amp;search=LabSolutions+GCMS"><strong>LabSolutions™ GCMS</strong></a>™ Ver. 5.131 and later, LabSolutions DB/CS GCMS Ver. 6.131 and later</li></ul><h3><strong>3. Thermo Fisher Scientific: Trace analysis of epichlorohydrin in drinking water using GC-MS coupled with purge and trap</strong></h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/an_003894_gc_single_quad_isq_7610_environmental_an003894_na_en_70123385ae.pdf"><strong>Full PDF for download</strong></a></li></ul><p>Epichlorohydrin (ECH) is a versatile starting material in the production of drugs and polymers and is also used as an insect fumigant and solvent for organic synthesis reactions. ECH-based polymer pipes are commonly used in the production of drinking water due to their durability and resistance to corrosion. However, ECH is known for its high reactivity and toxicity, which poses significant health risks if it contaminates drinking water. Exposure to ECH can cause respiratory issues, skin irritation, and has been classified as a probable human carcinogen.<sup>1</sup></p><p>Due to these risks, many countries have imposed strict limits on the amount of ECH allowed in drinking water. Recently, Europe set a minimum detection limit (MDL) of 30 parts per trillion (ppt) for ECH in drinking water.<sup>2</sup> Whereas typically required detection limits for most compounds mandated for analysis in Europe can be achieved using methods based on static headspace, the stringent MDL required for ECH requires preconcentration, for example using purge and trap (P&amp;T) technology.<sup>3,4</sup> This technology involves purging the water sample with an inert gas to release volatile organic compounds (VOCs), which are then trapped and concentrated for analysis, ensuring reliable detection at very low concentrations. In the United States, the analysis of VOCs in drinking water is mandated by the Environmental Protection Agency (EPA). The EPA requires the use of P&amp;T technology for drinking water analysis to ensure that even trace amounts of harmful compounds like ECH are detected and managed appropriately.&nbsp;</p><p>The following evaluation describes the use of the ISQ 7610 Single Quadrupole MS system coupled with the Thermo Scientific™ TRACE™ 1610 GC with the Thermo Scientific™ HeSaver-H2 Safer™ split/splitless injector and Teledyne LABS Tekmar Lumin P&amp;T concentrator combined with the AQUATek LVA autosampler for the analysis of ECH in drinking water.</p><h4><strong>Experimental</strong></h4><h5><strong>GC-MS parameters&nbsp;</strong></h5><p>A <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/486"><strong>TRACE 1610 GC</strong></a> was coupled to the <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/484"><strong>ISQ 7610 MS</strong></a> equipped with the Thermo Scientific™ NeverVent ™ vacuum probe interlock (VPI) and an ExtractaBrite ion source. A <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/1773"><strong>Thermo Scientific™ TraceGOLD™ TG-VMS column</strong></a>, 30 m × 0.25 mm, 1.4 µm film (P/N 26080-3320) was used for compound separation. The HeSaver-H2 Safer SSL injector was utilized to reduce the carrier gas consumption by decoupling the gas used for the chromatographic separation from the gas used to pressurize the inlet and maintain split and purge flows. The critical separations were maintained with a run time of under 15 minutes.</p><p>For this analysis, the ISQ 7610 MS was operated in Selected Ion Monitoring (SIM) mode for increased selectivity, as required for this application. Extended method parameters for the ISQ 7610 MS are shown in Table 2.</p><h5><strong>Instrument control and data processing&nbsp;</strong></h5><p>Data was acquired, processed, and reported using the <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/76"><strong>Thermo Scientific™ Chromeleon™ Chromatography Data System (CDS)</strong></a>. This software can control both the GC-MS system and the Tekmar Lumin P&amp;T with the AQUATek LVA. This allows a single software to be utilized for the full workflow, simplifying the instrument operation. This application note is available for download via the Thermo Scientific™ AppsLab Library, which contains all the parameters needed to acquire, process, and report the analytical data for analysis of ECH.5</p><h4><strong>Conclusion&nbsp;</strong></h4><p>This study demonstrates the capability of the Tekmar Lumin P&amp;T with the AQUATek LVA system connected to the ISQ 7610 Single Quadrupole GC-MS to detect and quantify low-level ECH in drinking water samples, in compliance with EPA requirements.&nbsp;</p><ul><li>Utilizing the Tekmar Lumin P&amp;T’s ability to purge with nitrogen, along with using the HeSaver-H₂Safer SSL injector, nearly four times less helium was consumed during the analysis without sacrificing system performance.&nbsp;</li><li>The linearity of the calibration curve from 30 ppt to 5,000 ppt passed method requirements.</li><li>The application proved robust during an extended study with 20 samples of a 1,000 ppt ECH standard injected over a series of 124 injections, obtaining 4.4% precision and 118% accuracy of the recovery.</li></ul>

News from LabRulezGCMS Library - Week 50, 2025

Enhancing the targeted and untargeted analysis of honey by vacuum-assisted SPME-GC × GC-MS. A green, practical, and highly informative approach

<p><strong>Our Library never stops expanding. What are the most recent contributions to LabRulezGCMS Library in the week of 16th March 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 posters by <strong>Agilent Technologies / ASMS </strong>and <strong>MDCW / William &amp; Mary, </strong>application note by<strong> Shimadzu </strong>and other document by <strong>Thermo Fisher Scientific!</strong></p><h3><strong>1. Agilent Technologies / ASMS: Analysis of Extractables and Leachables in Catheters Using Accurate Mass Libraries and High-Resolution GC/MS and LC/MS</strong></h3><ul><li>Poster</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/ps_7250_revident_extractables_leachables_asms_2025_tp_317_en_agilent_e6d3b2e923.pdf"><strong>Full PDF for download</strong></a></li></ul><p>Materials used in the production of medical devices contain substances that have the potential to leach from the devices. Extractables and leachables (E&amp;L) represent a range of structurally diverse compounds including antioxidants, UV absorbers, dyes, catalysts, plasticizers and polymer degradation products. Therefore, both liquid and gas chromatography techniques coupled with mass spectrometry detectors (LC/MS and GC/MS) are utilized to achieve a comprehensive chemical characterization. Application-specific accurate mass libraries combined with an efficient screening workflow, helps to increase confidence in compound identification that saves time on reviewing data while focused on E/L relevant compounds. In this study, we analyzed catheters extracts using high-resolution MS and performed data analysis using accurate mass libraries.</p><h4><strong>Experimental</strong></h4><p>Catheters from three suppliers were used in this study. Catheter A was made from PVC, and did not include DEHP, DINP, BPA or natural rubber latex. Catheter B was made with natural rubber latex base and silicone elastomer coating, and there was no claim to be phthalate or BPA free. Catheter C was a silicone-coated latex catheter made with natural rubber latex base and no DEHP or BPA. E&amp;L standards were obtained from AChemTek. Catheters were extracted with ethanol:water 1:1 solvent at 37 ˚C for 24 and 48 hours as well as 7 days and analyzed using GC/Q-TOF and <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library?mainauthorItems=10&amp;search=Revident+LC%2FQ-TOF"><strong>LC/Q-TOF systems</strong></a>. The GC/MS analysis was performed using the <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=10&amp;search=8890+GC"><strong>8890 GC</strong></a> coupled to the <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=10&amp;search=7250+GC%2FQ-TOF"><strong>7250 Q-TOF</strong></a> and the new Agilent low bleed DB-5Q column.</p><h4><strong>Results and Discussion</strong></h4><h5><strong>Accurate Mass E&amp;L Library for GC/Q-TOF</strong></h5><p>To create a new Agilent accurate mass E&amp;L Personal Compound Database Library (PCDL) for GC/Q-TOF, over 400 spectra have been collected for E&amp;L compounds. All accurate mass fragment ions in each spectrum have been annotated with formulas based on accurate mass information and isotope ratios (Figure 3). The fragment formula annotations were then verified and converted to the theoretical m/z.</p><h4><strong>Conclusions</strong></h4><ul><li>A combined workflow for the analysis of extractables and leachables by high-resolution GC/MS and LC/MS was developed using catheter extracts.</li><li>Both GC/MS and LC/MS techniques were necessary to cover a comprehensive list of E&amp;L compounds. Although several E&amp;L compounds were detected by<br>both GC/MS and LC/MS, in most cases hydrocarbons, most plasticizers, and some antioxidants were more amenable to GC/MS.</li></ul><h3><strong>2. MDCW / William &amp; Mary: A sustainable approach to nontargeted analysis using hydrogen as a carrier gas for GC×GC</strong></h3><ul><li>Poster</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/P_13_Fisher_2c50f2c420.pdf"><strong>Full PDF for download</strong></a></li></ul><p>Comprehensive two-dimensional gas chromatography (GC×GC) is a separation technique used to separate complex mixtures based on two different retention mechanisms, usually polarity and volatility. A nontargeted approach is commonly used for a separation technique such as GC×GC. This type of approach means that instead of looking for one or two specific components and disregarding the rest of the sample, the whole sample can be viewed exhaustively. This approach is more applicable for forensic cases especially, where the identity or composition of the sample is unknown. It is also a more sustainable approach because only one run is needed to have the full characterization of a sample instead of needing to run a sample multiple times with a different target analyte each time.</p><h4><strong>EXPERIMENTAL</strong></h4><ul><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/37"><strong>LECO’s Pegasus BT4D</strong></a> instrument was used for this project.</li></ul><h4><strong>RESULTS</strong></h4><p><strong>AGREEprep Comparisons:</strong> The overall scores for the two methods were 0.44 and 0.52 for helium and hydrogen, respectively. This means that the hydrogen method is more sustainable than the helium method. The criteria breakdown in Figure 6 shows the 10 different criteria used to score the methods, including sample throughput, sample preparation steps, and sustainable material usage, namely carrier gas choice.</p><h4><strong>CONCLUSIONS</strong></h4><p>The Restek EZGZ Method Translator can be used to provide three possible hydrogen methods for any given helium method. After inputting the values of a helium method, the respective hydrogen values are given for three possible methods, each prioritizing something different: translate, efficiency, and speed. The translate method was chosen as the best choice.&nbsp;</p><p>The hydrogen method achieved a higher score on the AGREEprep metric, meaning that this method is more sustainable that the helium method. This better score is solely due to the carrier gas change – everything else in the methods stayed constant.&nbsp;</p><p>Hydrogen as a carrier gas allows for higher sample throughput and faster run times. It can also be a renewable resource, made through the electrolysis of water in a laboratory using a generator.&nbsp;</p><p>A nontargeted approach is inherently greener than a targeted approach because instead of re-running a sample multiple times to analyze a different component each time, the whole picture was captured from the beginning and can be looked at through a different lens to analyze a new component.</p><h3><strong>3. Shimadzu: Analysis of PFAS in Textiles Based on EN 17681-1 and EN 17681-2</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_01108_en_e04fe25939.pdf"><strong>Full PDF for download</strong></a></li></ul><h5><strong>User Benefits</strong></h5><ul><li>Combining LCMS and GCMS enables the determination of PFAS below threshold limits in textiles.&nbsp;</li><li>Spike recovery test shows good percentage recoveries of all compounds (70–130 %) that are at or below the EU POPs threshold limit (25 ppb).</li><li>LabSolutions software offers integrated control over GCMS and LCMS for more efficient testing and data analysis.</li></ul><p>Per- and polyfluoroalkyl substances (PFAS) are used in a wide range of applications 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, and products<sup>1)</sup>.&nbsp;</p><p>EN 17681 is a European standard that describes methods for determining PFAS in textiles. The EN 17681 standard is divided into two parts according to the target compounds and methods. EN 17681-1 describes an LC/MS/MS method that targets ionic PFAS, and EN 17681-2 describes a GC/MS(/MS) method that targets certain semi-volatile and volatile neutral PFAS. A 2025 revision of EN 17681-1 changed the sample preparation method for more efficient PFAS extraction<sup>2),3)</sup>.&nbsp;</p><p>This Application News describes the analysis of the target compounds shown in Table 1 based on the EN 17681-1 and EN 17681-2 standards, using both LC/MS/MS and GC/MS/MS.</p><h4><strong>&nbsp;EN 17681-1 (LC/MS/MS) Analysis Conditions</strong></h4><p>Analysis was performed using the <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library?mainauthorItems=1&amp;search=LCMS-8050RX"><strong>LCMS-8050RX triple quadrupole mass spectrometer</strong></a> (Fig. 1, left). The analysis conditions used are shown in Table 3. Analyzing PFAS necessitates caution because PFAS can leach from the analytical system, the mobile phase or other sources. PFAS contamination from the system was minimized by attaching a delay column between the mixer and autosampler. The mobile phase was also prepared using PFAS grade reagents.</p><h4><strong>EN 17681-2 (GC/MS(/MS)) Analysis Conditions</strong></h4><p>Analysis was performed using a <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=1&amp;search=GCMS-TQ8050+NX"><strong>GCMS-TQ8050 NX triple quadrupole mass spectrometer</strong></a> (Fig. 1, right) that was equipped with a boosted efficiency ion source (BEIS). The BEIS optimizes the electron beam focus for maximum ionization efficiency, enabling reliable analysis of PFAS at very low levels. The analysis conditions used are shown in Table 4.</p><h4><strong>Results from Analysis of Ski Wear</strong></h4><p>Old ski clothing was used as a sample. The results obtained from analyzing this sample by the EN 17681-1 (LC/MS/MS) method are shown in Fig. 11. To investigate the effect of the EN 17681- 1:2025 update, analysis was performed using both the preupdate (EN 17681-1:2022) and post-update (EN 17681-1:2025) sample preparation methods. The alkaline hydrolysis treatment used by the EN 17681-1:2025 method dramatically increased the amounts of NMeFOSE, 6:2 FTOH, 8:2 FTOH, and 10:2 FTOH that were detected, and these compounds were detected at levels above the upper limit of their respective calibration curve ranges. This shows that PFAS extraction is improved by using the updated EN 17681-1:2025 sample preparation method. Of the 33 compounds targeted by the LC/MS/MS method, 20 were detected in the sample.&nbsp;</p><p>Analyzing the sample by GC/MS/MS using the EN 17681-2 method detected 8 out of the 12 compounds targeted by the EN 17681-2 method. Of these, 8:2 FTOH and 10:2 FTOH were detected at levels above the upper limit of their respective calibration curve ranges (Fig. 12).</p><h4><strong>Conclusion&nbsp;</strong></h4><p>The analysis of PFAS in textiles was performed according to EN 17681-1 and EN 17681-2 standards, utilizing the LCMS-8050RX and GCMS-TQ8050 NX systems. By combining LC/MS/MS analysis and GC/MS analysis, all target compounds were successfully measured at levels of 25 ppb or less. Spike recovery test at the EU POPs threshold limit (25 ppb) also demonstrated good percentage recovery (70–130 %) for all compounds. Results also showed that PFAS extraction was improved by using the EN 17681-1:2025 sample preparation method, which was updated in 2025.</p><h3><strong>4. Thermo Fisher Scientific: Fast on-line monitoring of flare gases</strong></h3><ul><li>Other document</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/fast_on_line_monitoring_of_flare_gases_wp1635_27fa9188ff.pdf"><strong>Full PDF for download</strong></a></li></ul><h4><strong>Measurement of flare gas streams by process mass spectrometry</strong></h4><p>Process mass spectrometry (MS) is particularly suited to the measurement of flare gas streams because it offers accurate, fast, multicomponent analysis. Table 1 shows an example of a flare gas stream containing hydrogen, nitrogen and hydrocarbons up to C6. Analysis of these eleven components will typically be performed in just 20 seconds, allowing one mass spectrometer to monitor more than one flare, depending on the distances involved. Alternatively, one MS can be used to measure process streams and flare streams, even though the composition and concentrations may be very different.</p><h4><strong>Advantages of magnetic sector MS&nbsp;</strong></h4><p>Thermo Fisher Scientific manufactures both quadrupole and magnetic sector mass spectrometers. Over thirty years of industrial experience have shown the magnetic sector based analyzer offers the best performance for industrial online gas analysis. <strong>Thermo Scientific™ Prima PRO process mass spectrometers</strong> (Figure 1) offer ideal capabilities for industrial gas analysis.&nbsp;</p><p>Key advantages of magnetic sector analyzers include improved precision, accuracy, long intervals between calibrations and resistance to contamination. Typically, analytical precision is between 2 and 10 times better than a quadrupole analyzer, depending on the gases analyzed and complexity of the mixture.&nbsp;</p><p>Neutral gas atoms and molecules are first converted into positively charged ions in the Prima PRO MS ion source. This is an enclosed type for high sensitivity, minimum background interference and maximum contamination resistance. It is a high-energy (1000 eV) analyzer that offers extremely rugged performance in the presence of gases and vapors that have the potential for contaminating the internal vacuum components. Prima PRO MS has a proven track record of monitoring high percent level concentrations of organic compounds without experiencing drift or contamination.</p><p>Ions are then accelerated through a flight tube, where they are separated by their mass to charge ratios in a magnetic field of variable strength. Since the magnetic sector mass spectrometer produces a focused ion beam at the detector, the peak shape obtained is ‘flat-topped’ and uniform response is observed over a finite mass width. As the height of the peak is directly proportional to the number of ions striking the detector it is also directly proportional to the concentration of the component being measured. As long as the measurement is taken anywhere on the peak’s flat top, high precision analysis will be observed.</p><p>The Prima PRO MS’ ability to measure over a wide dynamic range is critically important if the varying composition levels in flare gas are to be measured accurately. The Prima PRO MS has been independently evaluated by EffecTech UK, an independent specialist company providing accredited calibration and testing services to the energy and power industries for gas quality, flow and total energy metering. It is accredited to internationally recognized ISO/IEC 17025:2005 standards; this specifies the general requirements for the competence to carry out tests and/ or calibrations, including sampling.</p><h4><strong>Summary&nbsp;</strong></h4><p>Magnetic sector MS, as evidenced by the Prima PRO process MS performance, provides fast, accurate on-line analysis of flare gas composition. The inherent power of magnetic sector mass spectrometry, combined with the flexibility of GasWorks software, enables one Prima PRO MS to monitor not only flare gas streams, but also multiple process streams. Root cause fault analysis is therefore greatly facilitated, by comparing the detailed composition data from the flare gas stream with that of the various process streams. As well as complete compositional analysis, Prima PRO MS provides accurate fuel gas properties, including LHV, HHV, density, specific gravity, Wobbe Index, stoichiometric air requirement and CARI. This ensures waste gases are burnt to complete combustion and unburned pollutants are not emitted from the flare.</p>

News from LabRulezGCMS Library - Week 12, 2026

<p><strong>Our Library never stops expanding. What are the most recent contributions to LabRulezGCMS Library in the week of 11th May 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 note by<strong> Shimadzu, </strong>poster by <strong>MDCW / William &amp; Mary</strong> and brochure by <strong>Thermo Fisher Scientific!</strong></p><h3><strong>1. MDCW / William &amp; Mary: Optimizing Solvent Selection and Data Reduction Workflows for GC×GC Fire Debris Analysis</strong></h3><ul><li>Poster</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/P_14_O_Brien_63304669ee.pdf"><strong>Full PDF for download</strong></a></li></ul><section><div><div><div><div><div><div><h5><strong>What are Ignitable Liquid Residues (ILRs)?&nbsp;</strong></h5><ul><li>Chemical remains of ignitable liquids (IL) (e.g., gasoline or diesel) that did not fully burn during a fire&nbsp;</li><li>ILRs are usually petroleum-based products and contain complex mixtures of volatile chemicals, like hydrocarbons&nbsp;</li></ul><h5><strong>Forensic Analysis of ILRs&nbsp;</strong></h5><ul><li>Collection of porous materials like wood from the fire’s point of origin&nbsp;</li><li>Must be stored in airtight containers to prevent volatile ILR from evaporation&nbsp;</li><li>Passive headspace extraction onto activate charcoal strips (ACS) is used to extract ILRs from debris, and dichloromethane (DCM) is used to extracts ILRs from charcoal strips&nbsp;</li><li>Emerging is the use of two-dimensional gas chromatography – time of fight - mass spectrometry (GC×GC-TOFMS), with higher separation and resolution</li><li>Resulting chromatograms presents a pattern of peaks which can be used to identified specific type of accelerant used&nbsp;</li></ul><h5><strong>Chemometrics&nbsp;</strong></h5><ul><li>The discipline that focuses on the application of statistical and mathematical methods to analyze chemical data and extract meaningful information (Bovens, 2019)&nbsp;</li><li>Helps make sense of large datasets from analytical instruments, find pattens, and classify samples</li></ul><h4><strong>Methods</strong></h4><h5><strong>Analytical Instrumentation&nbsp;</strong></h5><ul><li>LECO corporation <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/1097"><strong>BTX4D GC×GC-TOFMS</strong></a> with <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/1289"><strong>Paradigm Shift reverse fill-flush (RFF) flow modulator</strong></a></li></ul><h5><strong>Software&nbsp;</strong></h5><ul><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/1873"><strong>ChromaTOF Sync 2D</strong></a> (LECO corporation)&nbsp;</li><li>R Statistical Software</li></ul><h4><strong>Conclusions</strong></h4><p>This study demonstrated that the use of chemometrics can be integrated into a data processing workflow to better understand data sets and create a streamlined process. Using UMAP, patterns identified that were not originally seen in PCA lead to the preferred solvents of ILR extraction being hexane and methanol. Since UMAP allowed visualization of local and global structures, groupings of gasoline samples allowed for better analysis of solvent effect.</p><h3><strong>2. Shimadzu: Multiresidue Pesticides Analysis in Solvent Extract of Annatto (Natural Color Additive) Using </strong><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=1&amp;search=GCMS-TQ8050+NX"><strong>GCMSTQ8050 NX</strong></a></h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/an_06_sip_gc_043_en_95576a9ac4.pdf"><strong>Full PDF for download</strong></a></li></ul><h5><strong>User Benefits</strong></h5><ul><li>&nbsp;Accurate and reproducible trace level quantitation of pesticides in highly pigmented complex matrix using Ultra-fast GCMSTQ8050 NX and QuEChERS extraction</li><li>Single-laboratory partial validated method for LOQ determination meeting regulatory guidelines</li><li>Ease of instrumental method optimization using GCMS Smart Pesticides Database Ver.2 from Shimadzu Corporation</li></ul><p>Annatto is an orange-red condiment and food colorant derived from the seeds of the achiote tree (Bixa Orellana) (Fig. 1). It is often used to impart a yellow to red-orange color to foods, but sometimes also for its flavor and aroma. Similar effects can be obtained by extracting some of the color and flavor principles from the seeds, which are then added to the food. Annatto and its extracts are now widely used in an artisanal or industrial scale as a coloring agent in many processed food products, such as cheeses, butter, baked goods, potatoes, snack foods, breakfast cereals, smoked fish etc. In these uses, Annatto is a natural alternative to synthetic food coloring compounds.&nbsp;</p><p>Owing to its large culinary uses and other diverse applications, use of chemical pesticides for its production in large quantities is imperative. Dye extraction process may result in concentration of pesticides and in turn contribute to adverse impact on human health when incorporated in various preparations. Hence quantitation of residual pesticides in Annatto extract becomes very important. As the oleoresin is a complex matrix, it is required to develop a rugged, sensitive and efficient method for extraction of residual pesticide and its analysis.&nbsp;</p><p>This study reports a highly sensitive method for simultaneous quantification of multiple pesticides in highly pigmented complex matrix of Annatto using modified QuEChERS[1] with triple quadrupole gas chromatography (GC-MS/MS) system.</p><h4><strong>Materials and Methods</strong></h4><p>For this study, customized reference standard mixture of most commonly observed pesticides in Annatto seeds was procured from Restek Corporation.</p><p>The calibration standards were analyzed from 0.5 to 1000 μg/L. Linearity was plotted by external standard method and using weighted regression of 1/C2. Sample was spiked at 3 levels i.e., 10, 25 and 100 μg/kg. Recovery samples were prepared in 6 replicates at each level. <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=1&amp;search=GCMS-TQ8050+NX"><strong>GCMS-TQ8050 NX</strong></a> (Fig. 2), manufactured by Shimadzu Corporation Japan, was used for quantitation. LabSolutions InsightTM was used for data processing, which helped in evaluating validation parameters with ease.</p><h4><strong>Conclusion</strong></h4><p>This study shows that the modified QuEChERS method combined with GC-MS/MS system is a reliable and efficient tool to quantify residual pesticides in Annatto extract sample. Although Annatto extract is a highly pigmented complex matrix, the modified QuEChERS method significantly reduces interference. Also, extremely sensitive Shimadzu GC-MS/MS allows trace level detection even after multifold dilution of sample. This helps in reducing contamination and enhancing ruggednessresulting in reproducible detection of analytes.</p><h3><strong>3. Thermo Fisher Scientific: Sentinel PRO 710 environmental mass spectrometer Precise real time gas analyzer for toxic volatile organic compounds</strong></h3><ul><li>Product specification</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/sentinel_pro_710_spec_sheet_en_886523bfc2.pdf"><strong>Full PDF for download</strong></a></li></ul><p>The <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=3&amp;search=Sentinel+PRO"><strong>Thermo Scientific™ Sentinel PRO Environmental Mass Spectrometer </strong></a>is a highly reliable and versatile gas analyzer ideal for reporting the presence of toxic VOCs from fugitive emissions in industrial settings to ensure worker safety.</p><h4><strong>Fugitive emissions of toxic VOCs&nbsp;</strong></h4><p>Wherever there is potential danger for fugitive emissions of toxic organic vapors from a chemical production unit, regulating authorities often require plants to keep records of ambient vapor concentrations to protect workers from exposure. Various forms of capture include evacuated vessels, organic vapor monitors, or purge and trap devices, all of which require samples to be sent for analysis. Alternatively, electrochemical sensors or open path FT-IR spectroscopy can provide more immediate results. However, none of these technologies are capable of providing the spatial and temporal resolution required to qualify as actionable information.&nbsp;</p><h4><strong>Analytical platform&nbsp;</strong></h4><p>The primary feature of the Sentinel PRO mass spectrometer is the magnetic sector analyzer. This field-proven technology has demonstrated the strongest performance for industrial on-line gas analysis. Magnetic sector technology offers precision, accuracy, long intervals between calibrations. The new touchscreen interface further enhances usability, providing intuitive in-person operation, simplified maintenance, and real-time data viewing. Multi-role user permissions ensure security and control allowing operators to customize settings based on their specific needs.&nbsp;</p><h4><strong>Comprehensive data collection&nbsp;</strong></h4><p>With speed and precision, the Sentinel PRO analyzer monitors all the critical areas for short-term exposure levels of toxic VOCs, and also provides accurate and time-weighted average exposure data. With a high number of sample points available, many can be located close to potential leak points such as valve stems, etc., enabling leak detection and correction before any toxic hazard is created.&nbsp;</p><h4><strong>Membrane inlet mass spectrometry&nbsp;</strong></h4><p>The analyzer is fitted with a membrane inlet to reduce the pressure of the sample air from atmospheric to the working pressure of the enclosed ion source. This allows a method of sample introduction that greatly enhances the system’s sensitivity to VOCs. Since the membrane is more permeable to VOCs than to major air gases, it provides enrichment by several orders of magnitude, enabling detection as low as 5 ppb (species dependent) permits easy membrane replacement during annual routine maintenance to minimize downtime and increase productivity.</p></div></div></div></div></div></div></section>

News from LabRulezGCMS Library - Week 20, 2026

<p><strong>Our Library never stops expanding. What are the most recent contributions to LabRulezGCMS Library in the week of 8th June 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>Agilent Technologies </strong>and<strong> Shimadzu</strong>, poster by <strong>MDCW / William &amp; Mary </strong>and brochure by<strong> Thermo Fisher Scientific!</strong></p><h3><strong>1. Agilent Technologies: Analysis of Bisphenol A in PET Granules Using the </strong><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=10&amp;search=8890"><strong>Agilent 8890</strong></a><strong>/</strong><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=10&amp;search=5977C"><strong>5977C</strong></a><strong> GC/MS System</strong></h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/an_bisphenol_a_pet_granules_gc_ms_system_5994_9240en_agilent_b9b78ea413.pdf"><strong>Full PDF for download</strong></a></li></ul><section><div><div><div><div><div><div><p>Polyethylene terephthalate (PET) is commonly used in the food and beverage industry, as it is easy to recycle. Contaminants in recycled PET, including acetaldehyde, benzene, limonene, and bisphenol A (BPA), can migrate from the packaging into the contents, potentially affecting the safety and quality of the products stored inside.<sup>1</sup> Monitoring these contaminants is crucial for ensuring the quality of recycled PET products, as they can affect the physical, chemical, and sensory properties of recycled PET, potentially leading to product defects or health concerns.<sup>1</sup> FSSAI officially permits the use of recycled PET (rPET) in food packaging, subject to strict safety and quality standards. This regulatory change was formalized through amendments notified in March 2025, effective immediately.<sup>2</sup> All recycled plastics used in food contact applications must comply with stringent overall and specific migration limits to ensure no harmful chemical transfer into food. The recycling processes require validated decontamination steps to reduce contaminants to safe levels. Manufacturers must certify their packaging materials under FSSAI guidelines.&nbsp;</p><p>GC/MS plays a critical role in assessing the safety and suitability of recycled plastics for food‑contact applications. The method adopted in this work demonstrates the use of an Agilent 8890 GC system coupled with an <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=10&amp;search=5977C"><strong>Agilent 5977C GC/MS system</strong></a> for quantification of BPA in PET granules.</p><h4><strong>Conclusion&nbsp;</strong></h4><p>This application note presents key strategies for the analysis of BPA in PET granules using GC/MS. The calibration used here ranged from 10 to 500 ng/mL, and the LOQ of the method was demonstrated at 500 ng/g for a PET sample. Repeatable results were found for six successive replicates of matrix-based standards at 100 ng/mL. Satisfactory recoveries were obtained for the tested matrix at 500 ng/g spiked concentration levels. Thus, this study demonstrates the applicability of this method for routine analysis of PET samples for identification and quantification of BPA.</p><h3><strong>2. MDCW / William &amp; Mary: Characterizing PqsE’s enzymatic activity in Pseudomonas aeruginosa by Volatile Organic Compound analysis with GC×GC-TOFMS</strong></h3><ul><li>Poster</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/Zimmermann_Nicolas_a9c80563a3.pdf"><strong>Full PDF for download</strong></a></li></ul><section><div><div><div><div><div><div><p>Pseudomonas aeruginosa is an opportunistic pathogen commonly associated with severe respiratory infections in immunocompromised patients. The pathogenic behaviors of P. aeruginosa are controlled by a cell-to-cell communication system called quorum sensing (QS). Many genes activated by QS include those responsible for forming biofilms and producing virulence factors. Interestingly, several virulence factors produced by P. aeruginosa are regulated by an interaction between a receptor, RhlR and a hydrolase, PqsE. Thus, the PqsE-RhlR interaction has become a target for antibiotic development and further characterization. Comprehensive two-dimensional gas chromatography paired with time-of-flight mass spectrometry (GC×GC-TOFMS) was chosen for metabolomic analysis as it is known for its high sensitivity and improved peak capacity. With GC×GC-TOFMS, the volatile organic compound (VOC), acetophenone, was discovered and utilized to measure dose-dependent inhibition of PqsE’s enzymatic activity in vivo by the small molecule inhibitor, Vorinostat. Furthermore, additional VOCs were identified that could add additional insight to PqsE’s function.</p><h4><strong>Experimental:</strong></h4><ul><li><strong>GC/MS:</strong> <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/1097"><strong>Pegasus BTX (LECO)</strong></a> with <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/82"><strong>LECO L-PAL3 Autosampler</strong></a></li><li><strong>Software:</strong> <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/348"><strong>ChromaTOF Tile</strong></a></li></ul><h4><strong>Summary</strong></h4><p>Eight VOCs identified that show statistically significant concentration differences between WT and D73A samples. The VOC acetophenone can be used to measure the enzymatic inhibition of PqsE in vivo. Vorinostat displayed a dose-dependent decrease in acetophenone levels.</p><h3><strong>3. Shimadzu: Extractable Study of Container Closure Pack Used to Store Oral Drug Product Using Dynamic Headspace Technique</strong></h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/an_06_sip_gc_044_en_ef833b01f0.pdf"><strong>Full PDF for download</strong></a></li></ul><h5><strong>User Benefits</strong></h5><ul><li>ASSP and simultaneous Scan/MRM analysis facilitating accurate qualitative identification and quantitation at the same time.</li><li>Dynamic headspace enables concentrating the analytes in cold trap with multi-injection count and helps to achieve higher sensitivity overstatic headspace, especially for trace level quantitation.</li></ul><p>Extractable and leachable (E &amp; L) studies are becoming increasingly important in the pharmaceutical industry as it is a mandatory requirement from FDA during filing of the drug product. The purpose of E &amp; L studies is to identify and evaluate possible toxicological risks. In this study, the regulatory references aim to identify traces of potential chemical substances. These substances may be harmful to patients due to their toxicity or may impact the activity of the drug product. Hence, to ensure the safety and efficacy of the drug throughout itsshelf-life, E &amp; L studies play an important role.&nbsp;</p><h5><strong>What Are Extractables and Leachables?&nbsp;</strong></h5><p>Extractables are organic and inorganic chemical entities that are released from a pharmaceutical packaging/delivery system, packaging component, or packaging material of construction into an extraction solvent under laboratory conditions[1].&nbsp;</p><p>Leachables are foreign organic and inorganic chemical entities that are present in a packaged drug product because they have leached into the packaged drug product from a packaging/delivery system, packaging component, or packaging material of construction under normal conditions of storage and use or during accelerated drug product stability studies[1].</p><h4><strong>Methods of Analysis</strong></h4><p>In this method, fifteen standards were analyzed by <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=1&amp;search=GCMSTQ8050+NX"><strong>GCMSTQ8050 NX</strong></a> with <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=1&amp;search=HS-20+NX"><strong>HS-20 NX</strong></a> (Trap) autosampler. For the method suitability, several important parameters like system suitability, linearity and precision were performed.&nbsp;</p><h4><strong>Conclusion</strong>&nbsp;</h4><p>The chromatographic profile of solvent reflux experiment shows higher number of extractables than aqueous incubation. Furthermore, in aqueous incubation, the content of extractables is well below the AET level. Since, placebo of the ophthalmic drug product is completely aqueous, CCP used in the analysis is totally safe and can be used for the storage of Penicillin V.&nbsp;</p><p>Shimadzu’s GCMS-TQ provides high scan speed of 20000 amu/sec with ASSP technology enabling simultaneous SCAN/MRM analysis which is crucial in E&amp;L study.&nbsp;</p><p>Generally, if the drug product falls under parenteral and oral drug product (PODP), evaluation threshold will be at higher side due to having wider SCT. However, AET for Penicillin V was at too low to evaluate with liquid injection and static headspace technique. This has been proved with the trap headspace technology.&nbsp;</p><p>To analyze the complete extractable profile with the sample screening is only possible with dynamic headspace as most of the extractables were not detected in the injection acquired with static headspace.</p><h3><strong>4. Thermo Fisher Scientific: </strong><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/2419"><strong>Thermo Scientific™ Orbitrap Exploris™ GC S Mass Spectrometer</strong></a></h3><ul><li>Brochure</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/br_004035_gc_orbitrap_exploris_gc_s_enviro_br004035_na_en_b1fad7f3af.pdf"><strong>Full PDF for download</strong></a></li></ul><p>The <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/2419"><strong>Thermo Scientific Orbitrap Exploris GC S</strong></a> is a high-resolution GC-MS system designed specifically for environmental and food safety laboratories performing analysis of persistent organic pollutants (POPs). Combining Orbitrap high-resolution accurate-mass (HRAM) technology with the proven Advanced Electron Ionization (AEI) source, the platform delivers exceptional sensitivity, selectivity, and robustness for demanding applications such as dioxins, dioxin-like PCBs, PFAS, pesticides, and emerging contaminants. The system is engineered to meet regulatory requirements while supporting multiple analytical workflows on a single instrument.</p><p>For dioxin and POPs analysis, the Orbitrap Exploris GC S offers performance traditionally associated with high-resolution magnetic sector instruments while providing a more streamlined and user-friendly workflow. The instrument achieves ultra-trace sensitivity, excellent repeatability, and regulatory-compliant mass resolution, supported by dedicated solutions including the TRACE Dioxin column, <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/422"><strong>TriPlus RSH SMART</strong></a> autosampler, and Chromeleon Dioxin HRAM eWorkflow software. Automated method templates, built-in quality control checks, and compliance-ready reporting simplify implementation and routine operation, enabling laboratories to increase throughput while maintaining confidence in analytical results.</p><p>The platform also excels in pesticide screening and quantitation across complex food and environmental matrices. High-resolution full-scan acquisition, wide dynamic range, accurate-mass measurements, isotope pattern confirmation, and extensive spectral library matching allow confident identification and quantitation of hundreds of compounds in a single analysis. The ability to perform retrospective data analysis enables laboratories to answer new regulatory or research questions without reinjecting samples, providing flexibility for evolving analytical requirements.</p><p>Supporting the mass spectrometer is a complete analytical ecosystem that includes Chromeleon Chromatography Data System for compliant quantitation workflows, Compound Discoverer software for advanced unknown identification and statistical analysis, the modular <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/483"><strong>TRACE 1600 Series GC</strong></a>, and the <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/422"><strong>TriPlus RSH SMART robotic autosampler</strong></a>. Together, these components provide a highly automated, future-ready platform that maximizes uptime, simplifies maintenance through NeverVent and modular GC technologies, and delivers reliable HRAM data for both routine monitoring and advanced environmental research.</p></div></div></div></div></div></div></section></div></div></div></div></div></div></section>

News from LabRulezGCMS Library - Week 24, 2026

Developing Quick Screening Method to Identify Rice Cultivars with Unique Aromatic Features

<h3><a target="_blank" rel="noopener noreferrer" href="https://www.isc2026.org/"><strong>ISC 2026</strong></a></h3><p><strong>The </strong><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/companies/314"><strong>International Symposium on Chromatography (ISC)</strong></a><strong> represents the oldest conference series on separation science. ISC symposia have been organised since 1956 in each even year. ISC is one of the premier meetings series for discussion of all modes of chromatography and separation science with a broad coverage of techniques and applications.</strong></p><h4><strong>35th International Symposium on Chromatography</strong></h4><p>📆<strong>6. - 10. September 2026</strong></p><p>📍<strong>Prague, Czech Republic</strong></p><h3><strong>REGISTRATION</strong></h3><blockquote><p class="cke-user_style-important"><strong>👉</strong><a target="_blank" rel="noopener noreferrer" href="https://www.czech-in.org/cmPortalV15/Account/Login?ReturnUrl=%2FcmPortalV15%2FPortal%2FISC26%2Fnormal"><strong>Register HERE for the ISC 2026</strong></a></p><p><strong>Late Registration until 25 August 2026</strong></p></blockquote><h3><strong>VENDOR SEMINARS</strong></h3><p>Discover the vendor seminars taking place during ISC 2026 in Prague, where leading analytical technology companies will present the latest developments in chromatography, mass spectrometry, and biopharmaceutical analysis. The programme covers stationary phase selectivity, UHPLC and ion chromatography innovations, superficially porous particle columns, virtual GC-MS method modelling, and advanced LC-MS workflows for emerging therapeutics.</p><h4><strong>Lunch seminar Avantor</strong></h4><h5><strong>Stationary Phase Selectivity: A Powerful Tool for Challenging Separations</strong></h5><ul><li>Monday, 7 September 2026&nbsp;</li><li>13:00-14:00</li><li><strong>👉</strong><a target="_blank" rel="noopener noreferrer" href="https://form.jotform.com/262112522534345"><strong>REGISTER HERE</strong></a></li></ul><p>Stationary phase chemistry is one of the most influential variables in chromatographic method development, providing a powerful means of controlling selectivity and achieving successful separations. While the wide range of commercially available stationary phase chemistries provides extensive opportunities to optimise selectivity, navigating these choices can be challenging, often leading to suboptimal column selection and missed opportunities to improve separation performance or speed of analysis.</p><p>This seminar will explore why stationary phase selectivity is one of the most powerful tools available to chromatographers for method development. Approaches for characterizing selectivity, including the Tanaka and Neue methodologies, will be discussed as practical tools for understanding and differentiating column chemistries. These concepts will then be used to demonstrate how stationary phase design can be rationalized and how a deeper understanding of selectivity can guide more effective column selection.</p><p>Application examples will highlight the impact of stationary phase chemistry across a range of analytes, including small molecules and peptides. The seminar will also examine how rational stationary phase selection can be incorporated into streamlined workflows for reversed-phase LC, HILIC and SFC method development.</p><p>Attendees will gain a deeper understanding of how strategic column selection can enhance resolution, reduce method development time, and enhance overall method performance. The concepts presented will provide a practical framework for scientists seeking a more structured, efficient, and knowledge-driven approach to method development.</p><blockquote><p><strong>Dr Matt James</strong></p><p>Matt James is a Senior Research Scientist at Avantor Sciences. Matt gained his PhD at University of Bristol and over the last 15 years, he has worked within the Technical Support, Applications and R&amp;D teams within Hichrom, now part of Avantor. Recent focuses have been HPLC/UHPLC method transfer and translation, the use of solid core phases, development of next generation LC stationary phases and the development of LC methods for key applications, such as the analysis of nitrosamines and PFAS by LC-MS/MS.</p></blockquote><h4><strong>Lunch seminar Shimadzu</strong></h4><h5><strong>Three New Reasons to Rethink Your Workflow</strong></h5><ul><li><strong>Dr. Gesa Schad</strong>, Shimadzu Europa GmbH</li><li><strong>Dr. Waldemar Weber</strong>, Shimadzu Europa GmbH</li><li>Monday, 7 September 2026&nbsp;</li><li>13:00-14:00</li><li><strong>👉</strong><a target="_blank" rel="noopener noreferrer" href="https://www.shimadzu.eu/forms/vendor-seminar-registartion_isc2026.html"><strong>REGISTER HERE</strong></a></li></ul><p>Join us for an engaging seminar introducing three new analytical solutions designed to help laboratories work smarter, respond faster, improve robustness, and achieve greater confidence in their results. As analytical demands continue to grow, laboratories need technologies that not only deliver strong performance, but also enhance efficiency, flexibility, and ease of operation. This seminar will highlight how the latest innovations can streamline workflows, support complex applications, and create new opportunities for productivity across the laboratory.</p><h5><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library?mainauthorItems=1&amp;search=nexera+IC"><strong>Nexera IC</strong></a><strong> – new compact ion chromatograph&nbsp;</strong></h5><ul><li>This new ion chromatography solution is designed to deliver reliable, high-sensitivity analysis for a anions and cations. With a focus on stability, ease of operation, and workflow efficiency, it helps laboratories achieve consistent results while supporting applications in environmental, food, chemical, and pharmaceutical testing.</li></ul><h5><a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library?mainauthorItems=1&amp;search=x4"><strong>Nexera X4</strong></a><strong> – No more compromise in UHPLC analysis</strong></h5><ul><li>This next-generation UHPLC platform is designed for laboratories that demand both ultra-high performance and robust operation, without compromise. Combining improved usability with dependable, consistent results, it helps optimize throughput, improve data quality, and simplify daily workflows across both routine and advanced analyses.</li></ul><h5><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=1&amp;search=GCMS-TQ+RX"><strong>GCMS-TQ RX Series</strong></a><strong> – Enhanced Sensitivity and Reliability in GC-MS/MS Analysis&nbsp;</strong></h5><ul><li>Our new advanced triple quadrupole GC-MS/MS systems are engineered to provide highly sensitive, selective, and dependable analysis for complex samples. Designed to support challenging applications such as trace-level detection and regulatory testing, they enable laboratories to strengthen analytical confidence, improve reproducibility, and manage demanding workflows more effectively.</li></ul><p>Join us to explore the latest innovations and gain valuable insights into our technologies. Register today to secure your place.</p><h4><strong>Lunch seminar Advanced Materials Technology</strong></h4><h5><strong>Advantages of Superficially Porous Particle Columns for HPLC and LC-MS</strong></h5><ul><li><strong>Stephanie Schuster, Joshua McBee, Conner McHale, Peter Pellegrinelli</strong> (Advanced Materials Technology, 3521 Silverside Rd., Wilmington, DE 19810)</li><li>Tuesday, 8 September 2026&nbsp;</li><li>13:00-14:00</li><li><strong>👉</strong><a target="_blank" rel="noopener noreferrer" href="https://halocolumns.com/isc-2026-vendor-lunch-seminar/"><strong>REGISTER HERE</strong></a></li></ul><p><br>Superficially porous particle (SPP) columns have existed in one form or another since the late 1960s. However, the benefits of the particle with the solid silica core surrounded by the porous silica shell were not realized for small molecules until 2006 when the first sub-3-µm superficially porous particle columns were introduced. This particle technology enabled efficiencies similar to sub-2-µm fully porous particles (FPPs) without the need for ultra-high pressure capable instrumentation. As a result of the high efficiencies and lower back pressure, the columns may be run at faster flow rates to enable high throughput separations. Additionally, the SPP columns are rugged and offer long column lifetimes. This presentation will highlight comparisons between SPP columns and FPP columns for separations of pharmaceuticals, pesticides, and oligonucleotides.</p><h4><strong>Lunch seminar Restek</strong></h4><h5><strong>Virtual Chromatographic Modelling Software For Optimising Separation Of Isobaric Compounds in GC-MS Methods</strong></h5><ul><li><strong>Sebastian Prisacariu, Anna Pulte</strong></li><li>Tuesday, 8 September 2026&nbsp;</li><li>13:00-14:00</li><li><strong>👉</strong><a target="_blank" rel="noopener noreferrer" href="https://form.jotform.com/262112099571355"><strong>REGISTER HERE</strong></a></li></ul><p>There is a constant balance for high-throughput laboratories between method run times for large panel analyses and resolution of analytes across these panels to allow sufficient data quality. Developing such methods is often time consuming and expensive for laboratories, as dedicated resources are required to test methods iteratively. Chromatographic modelling tools are becoming increasingly popular for method setup and refinement in high-throughput laboratories looking to minimise instrument and analyst downtime. These tools traditionally offer column phase and method condition suggestions based on the separation of a list of analytes, which can then be modified to improve specific separations as necessary.</p><p>When developing gas chromatography (GC) methods, shortening cycle time often comes at the cost of compounds co-eluting, with the expectation that a mass selective detector, such as a mass spectrometer (MS) will allow resolution through ion-selective quantitation. An issue arises when the method attempts to analyse isobaric compounds, which cannot be distinguished by MS, and as a result labs must rely upon physical separation via column phase chemistry.</p><p>As GC-MS techniques continue to be adopted by laboratories, there is a need for more tools that consider mass data for analytes when optimising large panel separations. The virtual chromatographic modelling tool used in this study is built with mass spectrum data for compounds included in libraries. When operating in “MS mode”, the software identifies isobaric compounds and prioritises their separation when making recommendations regarding column phase and method conditions. For those using non-mass selective detection methods, the tool is easily toggled to “FID mode” for users interested in resolving all compounds, regardless of specific mass, allowing for flexibility in instrumentation. Results help labs save time and resources in method development and refinement by considering the instrumentation involved in the model.</p><h4><strong>Lunch seminar Thermo Fisher Scientific</strong></h4><h5><strong>ASOs, ADCs, and Other Therapeutics: Advanced Characterization with Novel Reversed-Phase Columns and Integrated LC–MS Platform</strong></h5><ul><li>Tuesday, 8 September 2026&nbsp;</li><li>13:00-14:00</li><li><strong>👉</strong><a target="_blank" rel="noopener noreferrer" href="https://forms.cloud.microsoft/pages/responsepage.aspx?id=LXJ9toqqd0ehaevremo7Zz9X1b58h7ZKmlE1n_EPKh5URFJOMFFMVlZWOEc2NUQzWUlTTVY2UEhSTy4u&amp;route=shorturl"><strong>REGISTER HERE</strong></a></li></ul><p>Biotherapeutics are becoming increasingly structurally diverse, placing greater demands on analytical platforms that can support efficient development and regulatory readiness. Reversed-phase chromatography (RPC) remains a widely adopted and adaptable technique, supporting applications that range from oligonucleotide analysis to detailed protein characterization and post-translational modification assessment.</p><p>This seminar explores the integration of a macroporous, monodisperse reversed-phase column with a next-generation bioinert LC system for the analysis of two emerging classes of biotherapeutics. Antisense oligonucleotides were examined under optimized chromatographic conditions, using a design-of-experiments strategy to evaluate how ion-pairing reagents influence both LC separation and downstream MS performance. The platform was further applied to antibody–drug conjugates, combining RPC with Orbitrap mass spectrometry to support multi-level characterization. Intact, sub-unit, and bottom-up analyses enabled drug-to-antibody ratio determination alongside detailed PTM profiling — including glycosylation, oxidation, and deamidation — under native and stress conditions. Collectively, these studies demonstrate a streamlined and adaptable workflow for comprehensive biotherapeutic characterization.</p><blockquote><p><strong>Sara Carillo, Ph.D. &nbsp;</strong>(Bioanalytical Research Lead, Characterization and Comparability Laboratory National Institute for Bioprocessing Research and Training (NIBRT), Dublin, Ireland)</p><p>Sara Carillo completed her Ph.D. in chemical sciences in 2013 at the University of Naples Federico II, where she focused on the structural characterization of polysaccharides and glycoconjugates from Gram-negative bacteria using NMR and mass spectrometry techniques. In 2015, she joined the CCL group at NIBRT, led by Prof. Jonathan Bones. She began her postdoctoral research investigating the effects of extractables and leachables from single-use bioreactors on both the CHO cell N-glycome and the monoclonal antibodies they produce. She currently serves as Bioanalytical Research Lead at NIBRT, where her work centers on developing new mass spectrometry–based analytical approaches to enable deeper and more accessible understanding of biomanufacturing processes and the structural complexity of biopharmaceuticals.</p><p><strong>Sukhdev Bangar</strong> (Senior Product Marketing Manager, Thermo Fisher Scientific, Hemel Hempstead, UK)</p><p>Sukhdev graduated from De Montfort University (UK) with a BSc. in Pharmaceutical Sciences. After which he worked in the Pharmaceutical industry at GSK &amp; Astra Zeneca performing LC &amp; LC-MS analyses. From 2005 till 2023 Sukhdev worked various roles at Waters Corporation; LC-MS applications, Pharma LC-MS Demo group leader and HPLC Product manager. In his current role at Thermo Fisher Scientific he is responsible for marketing activities for the Vanquish analytical LC’s product portfolio. In this role, he represents the voice of the customer helping shape the future of Vanquish LC systems.&nbsp;</p></blockquote>

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The International Symposium on Chromatography (ISC) represents the oldest conference series focussing on separation science. ISC symposia have been organised since 1956 in each even year. ISC is internationally recognised as one of the premier meeting series for discussion of all modes of chromatography and separation science with a broad coverage of techniques and applications.

International Symposium on Chromatography - (ISC)

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