<ul>
<li>🎤 Presenter: Petr Vozka (California State University, Los Angeles, Los Angeles, USA)</li>
<li>💾 <a href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/P_Vozka_MDCW_3801260112/P.-Vozka-MDCW.pdf">Presentation in PDF</a></li>
<li>📁 LabRulezGCMS profile: <a href="https://gcms.labrulez.com/companies/219">Complex Chemical Composition Analysis Lab (C³AL)</a></li>
</ul>
<blockquote>
💡 Book in your calendar: <a href="https://gcms.labrulez.com/events/436">15th Multidimensional Chromatography Workshop (MDCW) January 2024</a>
</blockquote>
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/15th_Multidimensional_Chromatography_MDC_Workshop_Main_Banner_45f9ba053d/15th-Multidimensional-Chromatography-(MDC)-Workshop-Main-Banner.jpg" alt="15th Multidimensional Chromatography (MDC) Workshop 2024"/>
<h3>Abstract</h3>
<a href="https://gcms.labrulez.com/library?instrumentationItems=2">Comprehensive two-dimensional gas chromatography</a> (GC×GC) has become the state-of-the-art instrument for qualitative and quantitative analysis of volatile and semi-volatile complex mixtures and has emerged as a powerful separation tool for studying:
<ul>
<li><a href="https://gcms.labrulez.com/library?categoryItems=1&amp;instrumentationItems=2">environmental samples</a></li>
<li><a href="https://gcms.labrulez.com/library?categoryItems=4&amp;instrumentationItems=2">petroleum fractions</a></li>
<li><a href="https://gcms.labrulez.com/library?instrumentationItems=2&amp;search=POPs">persistent organic pollutants</a></li>
<li><a href="https://gcms.labrulez.com/library?instrumentationItems=2&amp;search=drugs">drugs</a></li>
<li>and many more...</li>
</ul>
In the past 60 years, plastic waste has increased exponentially, while only 9% of plastic waste has been recycled and 12% incinerated. The remaining 79% (about 6 billion tons) of plastic waste has accumulated in landfills or oceans, where they slowly degrade and release microplastics and other toxic chemicals into the environment. To reduce the amount of plastic waste, conversion methods such as pyrolysis and hydrothermal processing are used to make oils, which can be further used to produce alternative fuels. These fuels have an alkene (olefin) content of up to 50 wt.%. Unfortunately, there are currently no methods for detailed quantitation of olefins in such concentrations.
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/MDCW_Petr_Vozka_Chemical_conversion_of_plastic_waste_into_fuels_7d93807821/MDCW-Petr-Vozka-Chemical-conversion-of-plastic-waste-into-fuels.jpg" alt="MDCW/Petr Vozka: Chemical conversion of plastic waste into fuels"/>
This talk aims to introduce a novel method applicable for the characterization and quantitation of aliphatic olefins in complex oils from plastic depolymerization, alternative, and petroleum-based fuels using GC×GC with a flame ionization detector. The talk also introduces teaching strategies for GC×GC technique inclusion to the laboratory portion of class syllabi.
<blockquote>
💡 The Multidimensional Chromatography Workshop (MDCW) <a href="https://gcms.labrulez.com/companies/218">Profile LabRulezGCMS (EN)</a>
</blockquote>
<blockquote>
💡 The Multidimensional Chromatography Workshop (MDCW) <a href="https://lcms.labrulez.com/companies/218">Profile LabRulezLCMS (EN)</a>
</blockquote>
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/MDCW_Petr_Vozka_GC_GC_Training_Research_Facility_d25fe9ffe8/MDCW-Petr-Vozka-GCGC-Training-Research-Facility.jpg" alt="MDCW/Petr Vozka: GC×GC Training/Research Facility"/>
<h3>Presentation content</h3>
<ul>
<li>Comprehensive Two-Dimensional Gas Chromatography (GC×GC)
<ul>
<li>Introdction</li>
<li>GC×GC Chromatogram</li>
<li>Diagram of a GC×GC Instrument</li>
<li>How GC×GC is achieved</li>
<li>Modulation</li>
<li>GC×GC Chromatogram</li>
<li>GC×GC Classification</li>
<li>Quantitative results (some)</li>
</ul>
</li>
<li>Quantitative Analysis of Aliphatic Olefins in Fuels made from Plastic Waste by GC×GC
<ul>
<li>Detailed Analysis of Complex Chemical Mixtures</li>
<li>Plastic Waste in Oceans</li>
<li>Plastic Waste -Landfill</li>
<li>The growing plastic waste problem</li>
<li>Chemical conversion of plastic waste into fuels</li>
<li>DMDS Derivatization</li>
<li>Calculations</li>
<li>Results</li>
<li>Validation</li>
<li>Methods -disadvantages</li>
<li>Chromatogram –diesel-like sample pre-derivatization</li>
<li>Chromatogram –diesel-like sample post-derivatization</li>
<li>Future work</li>
</ul>
</li>
<li>GC×GC in Academia/Teaching
<ul>
<li>Course: Analytical Separations and Mass Spectrometry</li>
</ul>
</li>
</ul>
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/MDCW_Petr_Vozka_Diagram_of_a_GC_GC_Instrument_6a8ed03c86/MDCW-Petr-Vozka-Diagram-of-a-GCGC-Instrument.jpg" alt="MDCW/Petr Vozka: Diagram of a GC×GC Instrument"/>
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/MDCW_Petr_Vozka_How_GC_GC_is_achieved_4678d7bc6f/MDCW-Petr-Vozka-How-GCGC-is-achieved.jpg" alt="MDCW/Petr Vozka: How GC×GC is achieved"/>
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/MDCW_Petr_Vozka_GC_GC_Classification_62e9991a8b/MDCW-Petr-Vozka-GCGC-Classification.jpg" alt="MDCW/Petr Vozka: GC×GC Classification"/>

Quantitative Analysis of Aliphatic Olefins in Fuels made from Plastic Waste by Comprehensive Two-Dimensional Gas Chromatography (Petr Vozka, MDCW 2023)

ChatGPT is a language model developed by OpenAI, designed to understand and generate human-like text based on the input it receives. ChatGPT does not predict the future, solve highly technical chromatographic problems, or troubleshoot an instrument for you. So, what can ChatGPT do, and why is the entire world talking about it?
I first want to mention that I am not an AI expert (nor blogger), but rather someone who loves separations, gas chromatography, and anything that could simplify academic work. I believe ChatGPT is such a tool; however, it is sometimes misunderstood for something that it is not. Allow me to share my story with ChatGPT and some of its intriguing “tricks” with you.
In January 2023, just two months after the public release of ChatGPT, I was traveling to the 14th Multidimensional Chromatography Workshop in Liege, Belgium, all the way from Los Angeles (true story). Amid a longer layover, I decided to give ChatGPT a try. The initial requirement was to complete registration, and that&#39;s precisely where my journey took a pause. Tired of repeatedly entering my information and fabricating fake email addresses, I often encountered rapid responses like, &quot;This email address (poopitypoo@gmail.com) does not exist.&quot; Their efficiency left me intrigued. This marked my initial, almost comical first encounter with ChatGPT.
Following an enjoyable conference experience, I made my way back, engaging with my students and prompting them to embark on a paper-writing endeavor. Our starting point was the creation of a paper outline. Concluding the meeting, I strolled to my office (a 90-second walk), receiving a text from my students along the way:
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/The_LCGC_Blog_Are_You_Sick_of_Hearing_About_Chat_GPT_text_messages_Petr_Vozka_2023_05737766ab/The-LCGC-Blog-Are-You-Sick-of-Hearing-About-ChatGPT-text-messages-(Petr-Vozka-2023).jpg" alt="The LCGC Blog: Are You Sick of Hearing About ChatGPT - text messages (Petr Vozka, 2023)"/>
In no time, the outline landed in my inbox. And at that point, I finished the registration and started exploring ChatGPT&#39;s capabilities. And if you&#39;re wondering why, simply see below: the ChatGPT-generated outline (achieved in under 90 seconds) with the outline I had envisioned (added parts are marked in italics and omitted parts with bold).
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/The_LCGC_Blog_Are_You_Sick_of_Hearing_About_Chat_GPT_prompt_1_Petr_Vozka_2023_0243dfb1c8/The-LCGC-Blog-Are-You-Sick-of-Hearing-About-ChatGPT-prompt-1-(Petr-Vozka-2023).jpg" alt="The LCGC Blog: Are You Sick of Hearing About ChatGPT - prompt 1 (Petr Vozka, 2023)"/>
<h5>I. Introduction</h5>
A. Brief overview of the importance of olefin quantification in gas chromatography fuels made from plastic waste
B. Introduction of two dimensional gas chromatography (GCXGC) and flame ionization detector (FID)
<h5>II. Method Development</h5>
A. Selection of column dimensions and stationary phases
B. Optimization of GCXGC parameters such as modulation time and flow rate
C. Determination of optimum temperature programs for each column
E. Development of calibration standards using olefinic compounds and saturated hydrocarbons
F. Comparison of FID response factors for olefins and saturated hydrocarbons
G. Derivatization techniques for improving olefin detection and quantification
H. Normalization of chromatograms and calculations
<h5>III. Results and Discussion</h5>
A. Evaluation of the developed method for olefin detection and quantification
B. Comparison of the developed method with existing GC methods ASTM-approved methods
C. Discussion of the advantages and limitations of the developed method
D. GCxGC method linearity
<h5>IV. Conclusion</h5>
A. Summary of the key findings of the study
B. Implications of the developed method for olefin quantification in various industries
C. Future directions for further improvements of the developed method.
So, that isn&#39;t bad, is it? It&#39;s important to note that ChatGPT may not always provide accurate or reliable information, and its responses are based on patterns it learned from its training data. It can sometimes generate plausible-sounding yet incorrect or nonsensical answers, so critical thinking is advised when using its outputs. This aspect becomes particularly evident when ChatGPT is prompt to provide reference suggestions, as the references it generates are mostly made up but sound plausible due to ChatGPT&#39;s lack of direct access to external databases.
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/The_LCGC_Blog_Are_You_Sick_of_Hearing_About_Chat_GPT_prompt_2_Petr_Vozka_2023_2dd3e9b59a/The-LCGC-Blog-Are-You-Sick-of-Hearing-About-ChatGPT-prompt-2-(Petr-Vozka-2023).jpg" alt="The LCGC Blog: Are You Sick of Hearing About ChatGPT - prompt 2 (Petr Vozka, 2023)"/>
Here are a few examples generated by ChatGPT:
(1) Marriott, P. J., &amp; Shellie, R. (2002). Comprehensive two-dimensional gas chromatography–a review. Journal of Chromatography A, 965(1-2), 175-195.
(2) Phillips, J. B., Harada, R. M., &amp; Reichenbacher, K. (2011). Performance of a two-dimensional gas chromatography system with a nonpolar–polar column combination for the separation of compounds in gasoline and diesel fuels. Journal of Chromatography A, 1218(28), 4391-4397.
Unfortunately, these publications do not exist; however, if they were, we would definitely want to include them in our manuscript.
In a similar manner, ChatGPT can assist you in preparing the structure for the Introduction. Another useful tool is to ask ChatGPT to condense your Abstract if you need to meet a word count requirement. If the Abstract generated by ChatGPT turns out to be too short or long, you can continue with the instructions and direct ChatGPT to extend or shorten it. Alternatively, if you find yourself pressed for time and unable to read an entire paper, you can request ChatGPT to provide a summary of the results for you.
Since English is not my native language, I often use ChatGPT to check my grammar and even to rewrite, polish, or paraphrase certain paragraphs. For example, each paragraph presented here has been reviewed by ChatGPT. (Here is a helpful tip: copy and paste each paragraph individually before proceeding to the next one.) You might even move this one step forward and generate a paragraph.
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/The_LCGC_Blog_Are_You_Sick_of_Hearing_About_Chat_GPT_prompt_3_Petr_Vozka_2023_aba47a96e0/The-LCGC-Blog-Are-You-Sick-of-Hearing-About-ChatGPT-prompt-3-(Petr-Vozka-2023).jpg" alt="The LCGC Blog: Are You Sick of Hearing About ChatGPT - prompt 3 (Petr Vozka, 2023)"/>
“Using ChatGPT responsibly within academia involves a balanced approach that harnesses its advantages while upholding scholarly principles. Remember, ChatGPT is a tool, not a replacement for critical thinking or original research. To optimize its utility, define the specific aid you need, whether refining language or idea generation. Employ focused and evolving prompts to elicit accurate responses, cross-referencing its suggestions with reliable sources and experts to ensure credibility. While ChatGPT enhances your work, avoid overdependence by using it as a supplementary resource rather than a primary creator. Uphold ethical standards by transparently acknowledging ChatGPT&#39;s contributions in your work. By adhering to these practices, a symbiotic relationship between AI technology and academia can be nurtured, fostering responsible and effective integration.” – ChatGPT, 2023
No, there&#39;s no need to say &quot;please.&quot; I just prefer to be polite, just in case ChatGPT becomes Skynet from “The Terminator” movies one day.
You might come across a rumor suggesting that ChatGPT can answer questions from MIT exams, leading to the assertion that AI could potentially earn a university degree from such esteemed institutions. This was later refuted by several studies, with the conclusion that ChatGPT is indeed not capable of obtaining a degree from MIT. However, ChatGPT can answer simpler questions in a very efficient way. During the COVID-19 pandemic, many universities switched to remote teaching, which included remote student exams. Since students were capable of consistently finding methods to search for answers online despite the exams not being open-book format, one solution was to implement essay-type or true/false questions. However, these are no longer viable options, as ChatGPT can solve these general questions without the need for students to gather information from several sources and writing the summary in their own words (see below).
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/The_LCGC_Blog_Are_You_Sick_of_Hearing_About_Chat_GPT_exam_answer_1_Petr_Vozka_2023_395cc2443c/The-LCGC-Blog-Are-You-Sick-of-Hearing-About-ChatGPT-exam-answer-1-(Petr-Vozka-2023).jpg" alt="The LCGC Blog: Are You Sick of Hearing About ChatGPT - exam answer 1 (Petr Vozka, 2023)"/>
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/The_LCGC_Blog_Are_You_Sick_of_Hearing_About_Chat_GPT_exam_answer_2_Petr_Vozka_2023_1712617c72/The-LCGC-Blog-Are-You-Sick-of-Hearing-About-ChatGPT-exam-answer-2-(Petr-Vozka-2023).jpg" alt="The LCGC Blog: Are You Sick of Hearing About ChatGPT - exam answer 2 (Petr Vozka, 2023)"/>
An example of an essay-type question to support my argument could be: &quot;Briefly describe how a TOF mass analyzer works, based on the relationship between flight time (t), mass-to-charge ratio (m/z), and electric field (E).&quot; I haven&#39;t included the answer here, but you can give it a try yourself. As more and more students are using ChatGPT, professors will have to adapt as well.
So, what is the conclusion if there is one at all? Up until now, ChatGPT has remained ad-free and freely accessible, a rarity in my view. So, why not take advantage of it? Just keep in mind that ChatGPT is &quot;only&quot; proficient in a diverse array of natural language processing tasks, encompassing but not limited to: generating text (offering coherent and contextually relevant content based on given prompts, thus facilitating the creation of articles, blogs, poems, and more), completing text (forming sentences or paragraphs, serving as a valuable tool for brainstorming, writing prompts, and content generation), summarizing text (concisely condensing lengthy passages while retaining essential information), translating languages, extracting data (retrieving structured data from unstructured text), and much more.
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Petr_Vozka_Petr_Vozka_Assistant_Professor_na_California_State_University_Los_Angeles_2_1e25f61f27/Petr-Vozka-Petr-Vozka-Assistant-Professor-na-California-State-University-Los-Angeles-2.jpg" alt="Petr Vozka: Petr Vozka, Assistant Professor na California State University, Los Angeles"/>
<blockquote>
<h4>About the Author: Petr Vozka (<a href="https://gcms.labrulez.com/companies/219">Complex Chemical Composition Analysis Lab (C³AL)</a></h4>
</blockquote>
<blockquote>
<a href="https://gcms.labrulez.com/articles?search=Petr+Vozka">Petr Vozka</a> is an assistant professor of analytical chemistry in the Department of Chemistry and Biochemistry at the California State University, Los Angeles, USA. He is also the director of the Complex Chemical Composition Analysis Lab (C3AL). His research focuses on characterizing complex chemical mixtures using state-of-the-art techniques, such as two-dimensional gas chromatography (GC×GC) and high‑resolution mass spectrometry (HRMS). His primary focus is on developing methods for analyzing products from plastic waste conversion processes and organic compounds adsorbed on microplastics. He has one patent, six military reports, 25 journal publications, and over 30 research presentations, which include 10 invited lectures and invited presentations. He was invited as a keynote speaker to the 14th Multidimensional Chromatography Workshop in 2023.
</blockquote>

The LCGC Blog: Are You Sick of Hearing About ChatGPT?

🎤 Presenter: Genesis Barzallo, Hung Gieng, Petr Vozka (California State University, Los Angeles, Los Angeles, USA)
💾 <a href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/O_11_MSDW_Alkene_Quantitation_in_Plastic_Waste_Derived_Alternative_Fuels_using_GC_GC_FID_0e9ac7d5d7/O-11-MSDW-Alkene-Quantitation-in-Plastic-Waste-Derived-Alternative-Fuels-using-GCGC-FID.pdf">PDF presentation</a>
<blockquote>
💡 Book in your calendar: <a href="https://gcms.labrulez.com/events/518">16th Multidimensional Chromatography Workshop (MDCW) 3 - 5. February 2025</a>
</blockquote>
<h3>Abstract</h3>
In recent decades, the global accumulation of plastic waste has exceeded 10 billion tons, posing a significant environmental challenge. Conventional disposal methods like incineration and mechanical recycling have proven insufficient in addressing this crisis. However, through conversion techniques such as hydrothermal processing and pyrolysis, it is possible to transform plastic waste into alternative fuels containing varying olefin concentrations (up to 50 wt.%). Currently, no methods exist for quantifying olefin content at such high concentrations. In this study, we have developed a novel approach to characterize and quantify aliphatic olefins in plastic waste-derived fuels using comprehensive two-dimensional gas chromatography with a flame ionization detector (GC×GC-FID), a derivatization process involving dimethyl disulfide, and olefin standards from C5 to C25. Results obtained from GC×GC-FID closely align with established ASTM-approved methods, including D1159 (Bromine number), D5554 (Iodine value), and D1319 (FIA method). This study presents a robust and dependable technique for accurately quantifying olefins in fuels derived from plastic waste conversion.

Alkene quantification in plastic waste-derived fuels using GC×GC-FID (Genesis Barzallo, MDCW 2024)

Quantitative determination of olefins in pyrolysis oils from waste plastics and tires using selective adsorption by Ag–SiO2 followed by GC×GC-FID

In the realm of analytical chemistry, particularly in the specialization of chromatography, the <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/companies/218">Multidimensional Chromatography Workshop (MDCW)</a> stands out as a benchmark event. Hosted annually, this workshop not only showcases innovations in multidimensional chromatography but also fosters a deeply collaborative and inclusive scientific community. This article presents a structured overview of the key highlights and offerings of MDCW, based on insights shared by Dr. Petr Vozka (<a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/companies/219">Cal State LA's Complex Chemical Composition Analysis Lab (C³AL)</a>) in an interview with Organomation.<h4>What Is MDCW?</h4>The Multidimensional Chromatography Workshop (MDCW) is a technically focused, research-driven conference dedicated to advancing chromatography practices. The event brings together scientists from around the world to explore topics such as:<ul><li>Gas Chromatography (GC)</li><li>Liquid Chromatography (LC)</li><li>Supercritical Fluid Chromatography (SFC)</li></ul>Unlike many commercial conferences, MDCW is known for its academic rigor, collaborative environment, and comprehensive educational sessions.<h4>Key Features of MDCW</h4><h5>Free Registration and Generous Support</h5>One of the standout aspects of MDCW is its completely free registration, made possible by the generous sponsorship of industry and academic partners. This eliminates financial barriers for students and early-career researchers.As Dr. Petr Vozka emphasized:“The registration is completely free, thanks to the generous support of our sponsors. Attendees also get lunch, dinner, coffee, and drinks every day.”<h5>Global Accessibility</h5>MDCW alternates locations between Europe and the United States, enhancing accessibility for international researchers. This geographical rotation ensures that:<ul><li>Scientists from multiple continents can participate over time.</li><li>Institutional and regional barriers to access are minimized.</li></ul><h5>Comprehensive Coverage of Chromatographic Techniques</h5>The conference is not limited to one method. It incorporates presentations and discussions on GC, LC and SFC. This broad scope ensures that MDCW remains a key venue for cutting-edge separation science.<h4>Community and Collaboration</h4><h5>An Atmosphere of Support and Innovation</h5>MDCW is highly regarded for its welcoming and collaborative culture. Attendees often form long-term professional relationships and research collaborations that persist beyond the event.As Dr. Vozka described:“The atmosphere is incredibly supportive and collaborative. People genuinely root for each other, and many long-term partnerships grow out of these interactions.”<h5>Real-World Collaborations</h5>Dr. Vozka shared a personal example of the value of these connections:“I met <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/articles?search=Katelynn+Perrault">Dr. Katelynn Perrault </a>at my first MDCW. We started collaborating and now she’s one of my mentors. We talk almost regularly about research.”<h4>Commitment to Open Access and Digital Sharing</h4><h5>Recordings and Posters Available Online</h5>MDCW’s commitment to accessibility extends beyond the physical event. <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/companies/218">All presentations and posters are made available online</a> via the <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/companies/1">LabRulez</a> platform, contributing to the global exchange of scientific knowledge.<ul><li>Open-access approach encourages knowledge sharing.</li><li>Attendees can revisit sessions and share content with peers.</li></ul>Note: Presenters who prefer not to share their data publicly are fully respected, and their materials are not posted without consent.<h4>Growing Popularity and Future Outlook</h4><h5>A Rapidly Expanding Event</h5>The most recent edition of MDCW saw record attendance and abstract submissions, indicating its rising prominence and influence in the field of multidimensional chromatography.“This past year was especially exciting,” said Dr. Vozka. “It shows how fast the conference is growing.”<h4>Upcoming Event Details</h4>The <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/events/787">17th MDCW</a> is scheduled for:<ul><li>📅 Date: January 13–15, 2026</li><li>📍 Location:&nbsp;Williamsburg, Virginia, USA</li></ul>With its established reputation and growing community, MDCW 2026 is expected to deliver another impactful event.<h5>How to Get Involved</h5><ul><li>Visit the official website: <a target="_blank" rel="noopener noreferrer" href="https://www.multidimensionalchromatography.com">MultidimensionalChromatography.com</a></li><li>Explore previous content: Watch <a target="_blank" rel="noopener noreferrer" href="https://www.youtube.com/playlist?list=PLg-M6fM-05MrGrDggkl_UKzzcHPWPmssh">session recordings</a> and browse <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library?mainauthorItems=366">poster archives</a> on YouTube and the website of LabRulez</li><li>Engage with the community: Follow MDCW updates on academic and social media platforms.</li></ul><h4>Conclusion</h4>The Multidimensional Chromatography Workshop (MDCW) is more than just a scientific meeting — it is a community of scholars and practitioners committed to advancing separation science in a collaborative, inclusive, and highly accessible manner.From the zero-cost registration to the atmosphere of open mentorship and the global reach of its content, MDCW offers unmatched value to researchers at all stages of their careers.Whether you're a student just beginning your journey or an established expert seeking meaningful collaborations, MDCW is a must-attend event.<blockquote><h5>About the Speaker</h5>Dr. Petr Vozka is an expert in chromatography and a returning organizer and participant at MDCW. His experience and enthusiasm for the workshop reflect the values of inclusivity, knowledge sharing, and scientific advancement that define the event.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/VSCHT_Petr_Vozka_1329d3773e.jpg" alt="VŠCHT: Petr Vozka" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_VSCHT_Petr_Vozka_1329d3773e.jpg 143w," sizes="100vw" width="917" height="1000"></blockquote>

Why MDCW Is the Premier Conference in Chromatography

<a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/articles?search=petr+vozka">Dr. Petr Vozka</a>'s innovative research at California State University, Los Angeles is advancing the field of forensic chemistry through the comprehensive analysis of fingerprint aging. The <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/companies/219">Complex Chemical Composition Analysis Lab (C³AL)</a> utilizes cutting-edge comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry (<a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?instrumentationItems=13-2-3&amp;manufacturerItems=25">GC×GC-TOFMS</a>) to analyze fingerprint chemical composition changes over time [1]. Central to this complex analytical workflow is <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/1916">Organomation's 15 position MICROVAP nitrogen evaporator</a>, which plays a crucial role in sample preparation and concentration. This case study explores how the integration of the MICROVAP system has enhanced sample processing efficiency, improved reproducibility, and ultimately contributed to groundbreaking discoveries in fingerprint aging research that could transform forensic investigations.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Organomation_Enhancing_Forensic_Fingerprint_Analysis_How_the_MICROVAP_Sample_Concentrator_Aids_Solvent_Removal_d717987163.jpg" alt="Organomation: Enhancing Forensic Fingerprint Analysis - How the MICROVAP Sample Concentrator Aids Solvent Removal" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Organomation_Enhancing_Forensic_Fingerprint_Analysis_How_the_MICROVAP_Sample_Concentrator_Aids_Solvent_Removal_d717987163.jpg 230w," sizes="100vw" width="1080" height="733"><h5>Background: Dr. Vozka's Pioneering Fingerprint Research</h5><blockquote>Watch our exclusive interview with Dr. Petr Vozka <a target="_blank" rel="noopener noreferrer" href="https://www.youtube.com/watch?v=KncYDw-UCdg">here</a>!</blockquote>Dr. Petr Vozka serves as an Assistant Professor of Analytical Chemistry at California State University, Los Angeles, where he established the Complex Chemical Composition Analysis Lab (C³AL). His research facility has emerged as a beacon of opportunity for first-generation and underrepresented students, providing hands-on experience with advanced analytical instrumentation. The lab's partnership with LECO Corporation has been transformative, equipping students with access to a state-of-the-art comprehensive two-dimensional gas chromatography system [2]. This collaboration was formalized in 2023 when LECO presented Dr. Vozka with a GC×GC-enabled Pegasus TOFMS system in recognition of his extensive work in microplastics analysis using GC×GC technology, as well as his efforts in training the next generation of GC×GC users [2].Among Dr. Vozka's most promising research initiative is his collaboration with the Hertzberg-Davis Forensic Science Center on fingerprint aging research. This innovative project aims to understand how fingerprint components change over time, with the ultimate goal of developing a reliable aging model that could revolutionize forensic investigations [3]. The significance of this research extends beyond academic interest, potentially providing law enforcement with crucial temporal information about when fingerprints were deposited at crime scenes. By analyzing the complex chemical composition of fingerprints and monitoring how specific compounds degrade or transform over time, Dr. Vozka's team is laying the scientific groundwork for fingerprint chronology, an area that has traditionally depended on circumstantial evidence or witness testimony [3].<h4>The Fingerprint Analysis Workflow Challenge</h4>The analytical workflow for fingerprint aging analysis presents several challenges that require an innovative solution. The process begins with careful sample collection, where technicians moisten cotton swabs with dichloromethane and methodically swab the fingerprint from its surface [3]. This initial extraction captures numerous organic compounds present in fingerprints, with primary targets including cholesterol metabolites and squalene [3]. However, these compounds exist in extremely low concentrations in fingerprints, making their detection and quantification particularly challenging without proper sample preparation and concentration steps.Before these samples can be analyzed using the GC×GC-TOFMS system, they must undergo a <a target="_blank" rel="noopener noreferrer" href="https://www.organomation.com/what-is-sample-concentration">critical concentration step to remove excess solvent </a>while preserving the target analytes [4]. This intermediate step posed several technical hurdles for Dr. Vozka's research team. <a target="_blank" rel="noopener noreferrer" href="https://blog.organomation.com/blog/diy-evaporation-setups-vs.-professional-nitrogen-blowdown-systems-knowing-when-to-upgrade">Manual evaporation methods</a> were time-consuming and introduced significant variability between samples, potentially compromising the reliability of their aging models. Inconsistent evaporation rates and temperatures could lead to selective loss of volatile compounds, skewing the chemical profile of the fingerprint samples. Additionally, the research involved processing multiple samples from different time points to track changes over time, creating a workflow bottleneck with traditional single-sample evaporation methods.The precision required for forensic applications added another layer of complexity to the sample preparation process. Even minor variations in concentration technique could significantly impact the final analytical results and the validity of any aging models developed. The research team needed a solution that could provide controlled, reproducible evaporation for multiple samples simultaneously, while maintaining the integrity of the complex mixture of compounds present in fingerprint residues [4]. This critical stage in the analytical workflow presented an ideal opportunity for technological intervention to enhance both throughput and data quality.<h4>The MICROVAP: Efficient Sample Concentration</h4>The <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/1916">15 position MICROVAP nitrogen evaporator</a> from Organomation emerged as the ideal solution for Dr. Vozka's fingerprint analysis workflow. This compact benchtop evaporator is specifically designed for small batch solvent evaporations, such as concentrations of sample groups in microcentrifuge tubes, making it perfectly suited for the fingerprint extract samples collected on dichloromethane-moistened swabs [5]. The system's ability to simultaneously process up to 15 samples significantly improved laboratory throughput, allowing the research team to analyze multiple fingerprint samples within a single batch [4, 5]. This capability is especially valuable in fingerprint aging studies, where comparing samples collected at different time intervals is essential for developing accurate temporal models.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Organomation_15_Position_MICROVAP_Nitrogen_Evaporator_2_af9f41666c.jpg" alt="Organomation: 15 Position MICROVAP Nitrogen Evaporator" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Organomation_15_Position_MICROVAP_Nitrogen_Evaporator_2_af9f41666c.jpg 158w," sizes="100vw" width="2984" height="2953">The MICROVAP's precision temperature control, ranging from room temperature to 130°C with accuracy of ± 2°C, provides the careful regulation necessary for compound preservation during the concentration process. This feature is critical when working with fingerprint samples that contain a complex mixture of target compounds which may be susceptible to evaporation or degradation under higher temperature conditions. The newly redesigned heating unit offers <a target="_blank" rel="noopener noreferrer" href="https://blog.organomation.com/blog/redesigned-blow-down-evaporator-for-autosampler-vials-and-96-well-plates">enhanced heat stability for low-temperature applications</a>, which is crucial for preserving thermally labile residues. The system's stainless steel luer lock hubs and 4-inch x 19-gauge stainless steel needles enable precise control of nitrogen flow, further enhancing evaporation consistency and sample integrity [5].Implementation of the MICROVAP system into Dr. Vozka's laboratory workflow was straightforward due to its user-friendly design and minimal footprint. With a digital temperature controller and adjustable flow meter, the system allows for easy optimization based on sample and solvent properties. Its compact design conserves valuable hood space, a key benefit in space-constrained academic labs. Custom-designed sample blocks and inserts ensure optimal fit and efficient heat transfer for the specific glassware used in the fingerprint analysis workflow, further enhancing the processes efficiency and reproducibility [5].<h4>Impact and Results</h4>The integration of the 15 position MICROVAP into Dr. Vozka's fingerprint analysis workflow has yielded impressive improvements in both efficiency and analytical quality. Sample preparation time has been significantly reduced, allowing the research team to process more samples in less time and accelerating their progress toward developing a comprehensive fingerprint aging model. The batch processing capability has eliminated a major bottleneck in their workflow, enabling the analysis of larger sample sets that provide more robust statistical data for their aging models. This increased throughput has been achieved without sacrificing sample quality, thanks to the MICROVAP's precise control of evaporation parameters [4].Sample-to-sample consistency has dramatically improved since implementing the MICROVAP system, resulting in more reliable detection of critical chemical markers in fingerprint residues. The research team has been able to successfully detect cholesterol metabolites across samples, although they noted that squalene was not consistently detected in all samples, highlighting the complexity of fingerprint composition analysis [3]. The controlled evaporation environment provided by the MICROVAP has minimized the selective loss of volatile compounds, ensuring that the chemical profiles obtained from GC×GC-TOFMS analysis accurately represent the original fingerprint composition [4]. This improvement in analytical fidelity is essential for developing reliable aging models that can withstand forensic scrutiny.The safety aspects of the MICROVAP system have also benefited the laboratory environment, particularly when working with dichloromethane, a potential health hazard that requires careful handling. The enclosed evaporation process of the evaporator in the fume hood minimizes researcher exposure to solvent vapors, creating a safer working environment for researchers [5]. Additionally, the system's reliability has reduced the need for sample reprocessing, conserving valuable resources and maximizing the productivity of the laboratory. The consistent results obtained with the MICROVAP system have strengthened the validity of Dr. Vozka's research findings, positioning his team at the forefront of forensic fingerprint aging analysis [4].<h4>Future Directions and Conclusion</h4>Dr. Vozka's innovative application of GC×GC-TOFMS combined with the efficient sample preparation capabilities of the 15 position MICROVAP represents a significant advancement in forensic fingerprint analysis. The integration of this specialized evaporation technology has not only enhanced research productivity but also improved the quality and reliability of analytical results essential for developing accurate fingerprint aging models [4]. As the research continues, Dr. Vozka's team plans to refine their methods further, possibly expanding their analyte panel to include additional chemical markers that may provide more precise aging information [3]. The versatility of the MICROVAP system will support these evolving research needs, accommodating different sample types and volumes as the project progresses.The successful implementation of the 15 position MICROVAP in Dr. Vozka's laboratory demonstrates the critical importance of appropriate sample preparation technologies in advanced analytical workflows. While sophisticated instrumentation like GC×GC-TOFMS receives much attention, the quality of data ultimately depends on careful sample processing throughout the analytical workflow. Organomation's MICROVAP has proven to be an essential component in bridging the gap between sample collection and high-resolution analysis, ensuring that the full potential of advanced chromatographic techniques can be reached. As Dr. Vozka continues to train the next generation of analytical chemists and forensic scientists at Cal State LA, the integration of professional-grade sample preparation equipment like the MICROVAP provides students with valuable hands-on experience that mirrors real-world laboratory practices, preparing them for successful careers in analytical science.<blockquote>In need of a sample concentrator for your lab? Easily find the best model for your application by using our <a target="_blank" rel="noopener noreferrer" href="https://www.organomation.com/support/contact-help-support/sample-evaporator-product-finder">evaporator product finder tool</a>.</blockquote>

Enhancing Forensic Fingerprint Analysis: How the MICROVAP Sample Concentrator Aids Solvent Removal

Article

Product

Events

Webinars

Application

Academy

Video

Poster

Scientists

Plastics

Environment

Food

Water

Health

Presentation

Scientific article

Interview

Toxicology

Popularization

Science and research

Software

Covid-19

Career

Laboratories

Various

Zaměření

Type of News

Focus

The Multidimensional Chromatography (MDC) Workshop draws experts in this exciting field to share and discuss their research.

The Multidimensional Chromatography Workshop

LCGC is the leading global provider of digital and print content to the separation science market, enhancing the productivity, efficiency, and the overall value of separation techniques globally. With our commitment to editorial excellence we have pioneered innovation across a broad portfolio of digital and print platforms. LCGC covers all key growth areas in the field of separation science by providing unbiased peer-reviewed content, educational webinars, trusted troubleshooting advice, and best-practice applications solutions. Laboratory-based analytical chemists and influential chromatographers can improve productivity and enhance their proficiency through LCGC’s practical information, giving them a competitive advantage for the real-world analysis they face.

LCGC

Everything from the world of analytical chemistry in one place. We connect people in solving their problems. At Labrulez you will find all the necessary information easily, quickly and clearly. Stop searching and start finding.

LabRulez

Organomation, founded in 1959, designs and manufactures high-quality nitrogen evaporators and extraction systems. Known for innovation and durability, their lab instruments are used globally for efficient sample preparation with strong customer support.

Enhancing Forensic Fingerprint Analysis: How the MICROVAP Sample Concentrator Aids Solvent Removal

Why MDCW Is the Premier Conference in Chromatography

Quantitative determination of olefins in pyrolysis oils from waste plastics and tires using selective adsorption by Ag–SiO2 followed by GC×GC-FID

Alkene quantification in plastic waste-derived fuels using GC×GC-FID (Genesis Barzallo, MDCW 2024)

The LCGC Blog: Are You Sick of Hearing About ChatGPT?

Quantitative Analysis of Aliphatic Olefins in Fuels made from Plastic Waste by Comprehensive Two-Dimensional Gas Chromatography (Petr Vozka, MDCW 2023)

Upcoming events

Thermo Fisher Scientific Omics User Meeting 2026

Thermo Fisher Scientific Mass Spectrometry Users’ Meetings 2026

The International School on Mass Spectrometry (IntSMS) 2026

Webinars

TechTalk: Benefits of high-resolution ICP-OES for challenging applications

LC-MS/MS Analysis of Nitrosamines using novus V55

GLP-1 & GIP under the lens: HRMS strategies for synthetic peptide profiling