Principe : Gas chromatography (gc), gas chromatography, gc, english) is a separation technique of a mixture of volatile molecules, here called » analytes « . the cpg is based on a balance sharing of the analytes between a stationary phase and a mobile phase gas. The separation of the analytes was based on the difference of affinity of these compounds for the mobile phase and the stationary phase.
The mixture to be analyzed is vaporized and transported through a column containing a liquid or solid substance which constitutes the stationary phase. the transport is done with the aid of an inert gas, called » carrier gas « , which constitutes the mobile phase. the different molecules of the mixture will separate and exit the column one after the other, after a certain period of time which is a function of the affinity of the stationary phase with these molecules.
The mixture should be thermostable and sufficiently volatile.
This technique can be coupled to a mass spectrometer in order to quantify the separated species and therefore to have an analytical tool very efficient.