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4.2.1 Basic Chromatography Theory

A GC separation, like extraction, involves a partitioning of solutes between phases. In the case of GC, one phase in stationary and the other is mobile. The more a solute is partitioned in the mobile phase, the more it moves; in other words, the partitioning between the stationary and mobile phases affects the time required for a solute to travel through the instrument.

This is essentially the same for all types of chromatography (thin layer, paper, liquid-liquid, etc). Gas chromatography is more precisely described as gas-liquid chromatography.

John S. Riley, DSB Scientific Consulting