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Chromatography
Pronunciation
Definition 1
A laboratory technique used to separate different substances in a mixture. A gas or a liquid is used to pass the mixture through a column, paper, or special plate that contains absorbing materials. The substances in the mixture are separated based on how far they move through the material. The different substances may be visible to the eye or detected by a special machine. (NCI Dictionary)
Definition 2
A technique for the separation of complex mixtures that relys on the differential affinities of substances for a gas or liquid mobile medium and for a stationary adsorbing medium through which they pass. (NCI Thesaurus)
Definition 3
Any of a diverse group of techniques used to separate mixtures of substances based on differences in the relative affinities of the substances for two different media, one (the mobile phase) a moving fluid and the other (the stationary phase or sorbent) a porous solid or gel or a liquid coated on a solid support. The speed at which each substance is carried along by the mobile phase depends on its solubility (in a liquid mobile phase) or vapor pressure (in a gas mobile phase) and on its affinity for the sorbent. (Dorland, 27th ed) (NLM, Medical Subject Headings)
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