University of Wisconsin - Stout

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GC System

‘Gas Chromatography’ is a method of identifying substances and its properties by separating chemical components of a gas are separated by three processes: partition, adsorption, and volatility chromatography. The system operates by passing a sample through a coiled column inside an oven so it can be heated until its components vaporize.  This allows affinity with the stationary phase and boiling point to be detected since compounds are carried through at different times.  Retention time, the time between a compounds injection and detection by the sensor, is measured and can be compared with standards to identify the samples.