Comparison of State-of-the-Art Column Switching Techniques in High Resolution Gas Chromatography

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Abstract
Multi-dimensional gas chromatographic technology has advanced in recent years and numerous systems are now commercially available. In this paper, three different commercially available capillary-to-capillary column switching systems are evaluated in terms of activity and the analysis of a complex sample. The activity (defined as adsorption, acidity, and efficiency) for all three systems is shown to be small for various test compounds with the exception of one system. This system demonstrated considerably increased tailing of the solvent peak on the pre-column. All systems function well for heart-cutting from a complex sample, their primary intended application. The instrumentation studied includes both single and dual oven configurations. Although equally good results are obtainable on either a single oven or a dual oven instrument, dual oven instruments are recommended due to practical considerations.

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