Thermal desorption (TD) is a readily automated gas extraction technology based on standard gas chromatography parameters and providing an efficient, high-sensitivity alternative to convential solvent extraction. It is applied in single stage form to whole-air samples (canisters, bags, air streams) or in two stage form to organic analytes collected on sorbent tubes. TD involves the extraction of volatile or semi-volatile organic compounds from a sorbent by heating the sample, rapidly, in a flow of inert gas.
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