Page 40 - Illustrated Pocket Dictionary of Chromatography

COATING 35

GC chromatograph. This schematic representation shows all required components
needed for operation of the system. Very specialized components can be added
before the injector such as purge and trap or headspace analysis units. These are
used to meet special sample needs.

chromatography A series of techniques that are used to separate
multiple components in a samples based on relative affinities of these
components between the mobile phase and the stationary phase.

chromophore A functional group that is present in a compound
that absorbs radiation in the operating range of a UV-visible detector
(typically 190–800nm).

circular thin-layer chromatography See radial thin-layer
chromatography.
coating The process by which a liquid stationary phase is adsorbed
to the support material. The coating process is typically associated
with packed-bed GC columns. The coating is expressed as a weight
percent (compared with the weight of the support material). To create