Gas Chromatography

In this article we discuss the calibration technique of standard addition.

This technical article covers the internal standard method of GC calibration.

This technical article discusses general approaches to GC response calibration and focuses on the simplest; external calibration.

In this article we continue the previous discussion of ferrules used in gas chromatography.

In this article we cover the first part of an important and often neglected topic: ferrules.

Under discussion is one of the newer approaches to capillary column backflush: the uncoated pre-column configuration.

Continuing our discussion of the three configurations of capillary column backflush, we cover the coated pre-column configuration.

We continue the previous article's backflush discussion with a description of the most common form of backflush: post-column backflush.

In this technical article we introduce the concepts of backflushing capillary columns.

Continuing the previous discussion of the most popular GC detector, the FID, we cover deviations from typical unit carbon response, optimization and troubleshooting.

In this technical article we initiate a discussion on the workhorse detector of gas chromatography: the flame ionization detector.

In Part 3 we bring together the retention mechanism concepts discussed earlier to form a simple view of the nature of selectivity in liquid stationary phases used in gas chromatography.

To fully grasp the concepts of retention and selectivity of GC stationary phases, one must first understand the fundamental intermolecular interactions that lead to retention. In the second part of this series we discuss polar interactions; the...

To fully grasp the concepts of retention and selectivity of GC stationary phases, one must first understand the fundamental intermolecular interactions that lead to retention. This article discusses the most dominant of those interactions –...

Here, we tackle another potential problem of hot split injection: sample decomposition. Decomposition changes the nature of components in the original sample, affecting the “recovery” of target compounds. This in turn introduces errors in analytical...