. "Chromatography (/\u02CCkro\u028Am\u0259\u02C8t\u0252\u0261r\u0259fi/; from Greek \u03C7\u03C1\u1FF6\u03BC\u03B1 chroma which means \"color\" and \u03B3\u03C1\u03AC\u03C6\u03B5\u03B9\u03BD graphein \"to write\") is the collective term for a set of laboratory techniques for the separation of mixtures.The mixture is dissolved in a fluid called the mobile phase, which carries it through a structure holding another material called the stationary phase. The various constituents of the mixture travel at different speeds, causing them to separate."@en . .