This application note describes validation of a cryogen-free thermal desorption (TD) system with dual-column GC–FID detection for on-line monitoring of an extended range of very volatile species in ambient air, which includes ‘ozone precursors’ (as specified by the US PAMS program), polar compounds and monoterpenes. Using the new Kori-xr system for analyte focusing and water removal, the excellent chromatographic performance, linearities and reproducibilities for a 59-component standard mix is demonstrated, and it is shown how this method can be applied to a real air sample.
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