Chromatograph - Definition, Glossary, Details - Oilgae
A chromatograph is an instrument that is used to carry out chromatographic separations. The chromatograph consists of five different entities. The mobile phase supply system, the injection or sampling system, the column and column oven, the detector and the data acquisition and data processing system. In gas chromatography the mobile phase supply system consists of gas tanks, reducing valves, flow controllers and pressure gauges - Source
Chemistry Instruments: Gas Chromatograph - A gas chromatograph (GC) is used to separate and quantitative compounds that are volatile; that is, materials that can be turned into gases. Typically GC's are used for characterize very small amounts (1 or 2 micrograms) of organic compounds.