Multidimensional GC

Here is some of the most popular content posted on LCGC International this week.

Separation scientists frequently encounter critical pairs that are difficult to separate in a complex mixture. To save time and expensive solvents, an effective alternative to conventional screening protocols or mathematical peak width reduction is called iterative curve fitting.

In the testing of six different oat brands, headspace sorptive extraction and comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry (GC×GC–TOF-MS) reveal how various packaging types can affect and alter the oats’ volatile profile, underscoring the potential impact of packaging on food quality.

Giorgia Purcaro from the University of Liège was interviewed at RAFA 2024 by LCGC International on the benefits of modern multidimensional GC methods to analyze mineral oil aromatic hydrocarbons (MOAH) and mineral oil saturated hydrocarbons (MOSH).

In this article, the authors describe a simple workflow to develop a GC×GC method for a specific sample upon initial use, with the aim of decreasing the time to accomplish functional workflows for new users.

In this feature article, we profile three global cities (Cairo, Beijing, and Delhi) and how they are combatting the air pollution crisis to better protect the health of their residents.

Scientists recently used thermal desorption (TD) and gas chromatography– time-of-flight mass spectrometry (GC×GC-TOFMS) to track per- and polyfluoroalkyl substances (PFAS) emissions from materials used in firefighter gear.

Here is some of the most popular content posted on LCGC International this week.

Posters at the 2024 conference will feature research on a variety of topics from PFAS testing to the HPLC analysis of soft drinks.

The 2024 Gulf Coast Conference will include a variety of presentations on chromatography. This article features a sampling of some upcoming sessions.

The introduction of comprehensive two-dimensional gas chromatography (GC×GC) to the sample screening toolbox has substantially increased the ability to comprehensively characterize complex mixtures. However, for many gas chromatography (GC) users, the thought of having to learn to develop methods on a new technology is daunting. Developing a basic GC×GC method for most (nonspecialized) applications can be accomplished in minimal time and effort given parameter suggestions and ranges to target analytes in a sample of interest. In this article, the authors work describe a simple workflow to develop a GC×GC method for a specific sample upon initial use, with the aim of decreasing the time to accomplish functional workflows for new users.

Petroleum contamination from leaking underground storage tanks, for example, is a significant concern for both the environment and human health. Thorough characterization of the contamination is required to form appropriate risk assessments and remediation strategies, but until now, the determination of total petroleum hydrocarbons (TPHs) in soil has typically involved a convoluted and labour-intensive process. In this article, the analysis of TPH in environmental media is simplified using flow-modulated GC×GC–FID with quantitation based on pre-defined compound groupings. This approach overcomes the drawbacks of conventional solvent fractionation approaches, by eliminating the need for sample fractionation and automating data processing workflows.

Here are the top five articles published on LCGC International this week.

The article discusses the classification and characterization of GC×GC column sets based on polarity and orthogonality, introducing a standardized approach using a reference mixture called the Century Mix to evaluate the selectivity and performance of these column sets.

University of Washington scientists used comprehensive two-dimensional (2D) gas chromatography (GC×GC) paired with time-of-flight mass spectrometry (TOFMS) to study moisture-damaged cacao beans.

At HTC-18 in Leuven, Executive Editor of LCGC International, Alasdair Matheson, spoke to Jef Focant from the University of Liege about his talk entitled, “Targeted Blood Lipidomics of Colorectal Cancer."

At HTC-18 in Leuven, Executive Editor of LCGC International, Alasdair Matheson, spoke to Chiara Cordero from the University of Turin about the evolving role of AI and its effect on GCxGC in foodomics.

Scientists from the University of Turin, Italy have learned how to combine their complementary competencies in analytical chemistry and big data analytics to achieve significant advances in food science and health.

Here are the top five articles that the editors of LCGC International published this week.

Scientists recently analyzed the chromatographic profiles of postmortem bacterial species and their volatile organic compounds (VOCs) using comprehensive two-dimensional gas chromatography (GCxGC).

Kate Perrault Uptmor is an assistant professor at William & Mary focusing on nontargeted analysis on highly complex samples.

During the 18th International Symposium on Hyphenated Techniques in Chromatography and Separation Technology, experts presented a workshop on emerging industrial applications in MS.

In this edition of The LCGC Blog, Katelynn Perrault and James Harynuk discuss the technological needs one faces when setting up a workstation for chromatography data analysis.

At the 2024 Pittcon Conference, Elizabeth Humston-Fulmer of LECO Corporation presented an improved workflow which uses two-dimensional gas chromatography (GCxGC) with dual time of flight (TOF) MS/FID detection. Shortly after Pittcon, Humston-Fulmer discussed this analytical method with us.

In this edition of “Inside the Laboratory,” Katelynn Perrault Uptmor, PhD, an assistant professor of chemistry at the College of William and Mary, discusses her group’s current research endeavors, including using complex comparative data obtained from chemical analysis to understand and solve challenges in forensic science and other life science applications.

This study explores the feasibility of using human skin volatile organic compounds (VOCs) analyzed through comprehensive gas chromatography–time of flight–mass spectrometry (GCxGC-TOF-MS) and chemometric techniques, to potentially serve as biomarkers for tuberculosis diagnosis.

A recent review article examines how solid-phase microextraction–comprehensive multidimensional gas chromatography (SPME-GC×GC) has contributed to food analysis over the past 20+ years.

During a workshop at Pittcon, David Alonso of LECO Corporation discussed how gas chromatography–time-of-flight mass spectrometry (GC-TOFMS) can be used to identify polyfluorinated alkyl chemicals (PFAS) chemicals in anti-fog product solutions.

The 18th International Symposium on Hyphenated Techniques in Chromatography and Separation Technology will take place from 28–31 May 2024 in Leuven, Belgium.

Blood and sputum are the most common means of detection by diagnostic tests, but producing adequate sputum can be difficult given a dry cough is often a TB symptom.