Answer Posted / prasanna
GC may b gas solid chromatography or gas liquid
chromatography.In GSC stationary phase used is a solid and
mobile phase is carrier gas .the principle involved is
adsorption
.Whereas in GLC stationary phase used is liquid coated onto
a solid support.and mobile phase is carrier gas .here the
principle involved is partition.based on partition
coefficent,the compound which is more soluble in mobile
phase elutes first and compound which is more soluble in
stationary phase elutes last.carrier gas used is
helium,nitrogen,or hydrogen.GC requires temperature
programming.columns used may be packed or capilllary columns
which may be open tubular columns(SCOT,WCOT).IT also
requires flow regulators,flow
metrs,preheater,detectors(electron capture,thermal
conductivity,flame photometric,flame ionisation,)
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