Term: Chromatography
Definition: Any of a variety of techniques used to separate mixtures of drugs and their metabolites and other chemicals into individual components based on differences in their relative affinities for two different media: a mobile phase and a stationary phase. In gas chromatography, the mobile phase is inert gas such as nitrogen or helium and the stationary phase is a high-boiling liquid bound to fine particles packed in a glass column, or bound to the inner surface of a glass capillary column.
