Gas Chromatography (GC)

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.

Various gas flow measurement methods in the laboratory for GC users are compared.

The first three important stages in any GC analysis are explained.

In part 2 of this series, we complete a list of questions and answers about gases for GC.

In gas chromatography (GC), the sample vapor passes through the column and separates into its components ? a separation that is governed by the distribution between the mobile and stationary phases.

A panel of experts give their opinions about the current trends in gas chromatography (GC) instrumentation and how the technology could develop in the future.

This article discusses the details of how the newer techniques of sample preparation are simplified by the use of LC–MS-MS and GC–MS-MS technology.

A number of frequently asked questions about gases and their delivery to a gas chromatography instrument are addressed.

In this month's instament, John Hinshaw addresses a number of frequently asked questions about gases and their delivery to a gas chromatography instrument.

SPME decouples sampling from matrix effects that would distort the apparent sample composition or disturb the chromatographic separation. It is also easy to use and reduces solvent consumption.

Following the publication of “Analysis of the State of the Art: GC Instrumentation†in the August 2012 issue of LCGC, a reader notes further factors to consider, including poor user training, unanswered questions in fast GC, and the need for further instrument improvements, particularly better deactivation of the internal surfaces to minimize loss of trace samples.

Achieving efficient analyte transfer between columns is critical to gaining the benefits of multidimensional GC.

Comprehensive GCÃ-GC(qMS) provides a maximum chromatographic separation power in gas chromatography (GC). Combining it with the highly selective negative chemical ionization (NCI) mode gives highest sensitivity for electrophilic molecules like trichloroanisole and tribromoanisole.

This article describes the GC–MS and LC–MS screening methods developed by the Environment Agency for England and Wales for the analysis of both low-volumn water samples and extracts obtained from various designs of passive samplers.

In honor of LCGC's celebration of 30 years covering the latest developments in separation science, we asked a panel of experts (listed in the sidebar) to assess the current state of the art of gas chromatography (GC) instrumentation and to try to predict how the technology will develop in the future.

In honor of LCGC's celebration of 30 years covering the latest developments in separation science, we asked a panel of experts to assess the current state of the art of gas chromatography (GC) column technology, and to try to predict how the technology will develop in the future.

This month's instalment presents the latest tools and accessories for the gas chromatographer. Have you got what you need in your troubleshooting toolkit?

In this instalment John V. Hinshaw reviews gas chromatography instruments and accessories that were newly presented at Pittcon 2012 or were introduced to the marketplace in the preceding year.

Comprehensive GC×GC(MS) and LC×LC(MS) are chromatographic hyphenation methods providing the users with extremely large peak capacities.

An overview of important GC–MS techniques currently used in food analysis is described. Considerable attention is devoted to the use of the mass spectrometer, in relation to its poptential for separation and identification. The importance of comprehensive GC?GC is also discussed.