Gas Chromatography
Chromatograph
A physical separation method
A physical separation methodA physical separation method
It involves the distribution of componentIt involves the distribution of component
between two phasesbetween two phases
stationary phase
– solid <(10%)
– liquid >(90%)liquid >(90%
mobile phase
gas
Why use GC
Short Analysis Time
– Wide Choice of StationaryWide Choice of Stationary
PhasePhase
Wide Choice of DetectorsWide Choice of Detectors
Ease of Operation Ease of Operation
Separation of compounds
When analytes are
introduced into the column, the molecules, distribute, between the stationary and mobile phases.
The molecules in the mobile phase are carried down down the column
Those in the stationary
phase are temporarily immobile and do not move do not move down the column