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Chromatography is a collectiveterm used for a family of laboratory techniques for the separation of mixtures.The term is derived from Greek words тАШchromaтАЩ meaning тАШcolourтАЩ and тАШgrapheinтАЩmeaning тАШto writeтАЩ. Chromatographic techniques are based on the principle thatdifferent components are absorbed differently on an absorbent. There areseveral chromatographic techniques such as paper chromatography, columnchromatography, gas chromatography, etc.