Gas Chromatography (GC)

An interview with Hans-Gerd Janssen of Unilever Research and Development Vlaardingen and the University of Amsterdam. Janssen is involved with method development for gas chromatography, liquid chromatography, and mass spectrometry; the development of instrumentation for multidimensional chromatography for food analysis and biomacromolecular characterization; and problem solving and efficient routine analysis of foods (particularly oils and fats). This interview discusses the challenges encountered in the analysis of fats and oils, how multidimensional chromatography can be applied to the analysis, 2D LC for food-related compound analysis, the analysis of natural antioxidants in edible oils, and future steps in his research.

The anatomy of chromatographic peaks is examined with attention to features that help determine the suitability of individual chromatographs for a specific analysis task.

Gas chromatography with electron ionization and mass spectrometry (GC–EI-MS) detection is a workhorse among analytical techniques in metabolomics. A major challenge in the utilization of GC–EI-MS in metabolomics is the identification of unknowns.

Click here to view the complete E-Separation Solutions newsletter from September 19, 2013.

Tony Taylor provides insight on the best way to choose GC columns based on analyte or sample characteristics.

Click here to view the complete E-Separation Solutions newsletter from September 5, 2013.

This article provides an update on the search for an alternative to helium.

This article discusses how a dedicated air sampling system with TD–GC–FID can allow more frequent sampling of air pollutants.

Market Profile: GC–MS

Recently LCGC asked a panel of experts (listed in the sidebar) to assess the current state of the art of gas chromatography (GC) instrumentation and methods and to try to predict how the technology will develop in the future.

Understanding the chemistry behind GC separations can lead to faster problem identification and improved troubleshooting.

A practical and reliable analytical procedure that incorporates MDGC with a planar microfl uidic device as a Deans switch was developed for the characterization of chlorinated degreasers in marine gas oil.

Understanding the chemistry behind GC separations can lead to faster problem identifi cation and improved troubleshooting.

Long-distance running is examined as a metaphor for gas chromatography separations.

In this instalment, John Hinshaw compares the GC separation process to a long-distance run through a long corridor with some unique properties.

A fast and simple sample preparation method for the simultaneous determination of 11 phytohormones in plants by GC–MS has been developed.

John Hinshaw presents his annual review of new developments in the field of gas chromatography introduced at Pittcon 2013.

What problems in chromatogram may reveal, and what to do

Gas chromatography instruments and accessories that were newly on display at Pittcon 2013

John Hinshaw presetns his annual review of new developments in the field of gas chromatography introduced at Pittcon 2013.

Properly maintaining the GC column can lead to improved chromatography and detector troubleshooting tips allow faster GC problem solving.

Help with common problems with preparation, installation, and care

Comparison of gas flow measurement methods for GC laboratories

A method able to quantitate odorants at levels as low as 100 ppb (v/v)

In contrast to isocratic separations, gradient elution can sometimes seem to be counter-intuitive. Yet with the proper perspective, the things we intuitively understand about isocratic methods apply in a similar manner to gradients.