Collins Concise English Dictionary © HarperCollins Publishers::
gas chromatography n - a technique for analysing a mixture of volatile substances in which the mixture is carried by an inert gas through a column packed with a selective adsorbent and a detector records on a moving strip the conductivity of the gas leaving the tube. Peaks on the resulting graph indicate the presence of a particular component
Also called: gas-liquid chromatography
gas′ chromat′ograph, [Chem.]- Chemistrya chromatograph used for the separation of volatile substances.
gas′ chromatog′raphy.