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nature : also known as gas chromatography. Gas is a mobile phase used elution column chromatography. As the mobile phase containing gas as gas (gas carrier), such as helium, hydrogen, nitrogen, carbon dioxide. If the column packed solid (stationary phase) is a solid adsorbent, as gas-solid chromatography (gas-solid chromatography); Column fillings are coated with the chief vector (filled Chromatography) column or wall are covered with fixative (GC), called the gas-liquid color spectroscopy (gas-liquid chromatography). The former is based on the separation of adsorption and desorption, the latter distribution function. General valve or syringe used to introduce samples of its components were loaded into the gas chromatography system, the components of the nature and structure of the differences, and so the fixed phase stranded at different times, according to the order must be set into the gas detector for identification and can be used for qualitative and quantitative analysis. GC analysis with high selectivity, high performance, high sensitivity and analysis speed and wide application characteristics. Suitable for trace analysis. Widely used in chemistry, chemical engineering, petrochemical health, pesticide residues, biochemical substances, medicine, health, environmental protection and so on.
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