Extending the analysis of ozone precursors – Continuous, unattended, cryogen-free on-line monitoring of PAMS hydrocarbons and polar VOCs in ambient air by TD–GC–MS
This Application Note describes validation of a cryogen-free thermal desorption (TD)–GC–MS system 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. In addition to analysis of a 61-component standard mix and a real air sample, we demonstrate low method detection limits using the new trap-based Kori-xr system for eliminating water from the air stream.
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