Chromatography, derived from the Greek terms, chroma (colour) and grafo (to write), is the separation of components from a mixture. Preparative chromatography is a purification technique to extract a particular compound from a mixture, while analytical chromatography is used to estimate proportions of compounds present in the mixture. The mixture is dissolved in a ‘
mobile phase’ (typically, a liquid or gas), which flows through a stationary phase (solid, or a liquid resting on a solid) carrying different parts of the mixture with it at different rates. For example, the rate at which parts of a mixture are carried might depend on how soluble they are and how tightly they bond with the solvent. Browse this page to find suppliers of chromatography supplies including analyzers, chromatography media and HPLC equipment.