Detection of ozone-depleting substances (ODS) and halogenated greenhouse gases in industrial zones with a cryogen-free preconcentration–GC–MS system

This application note outlines a cryogen-free approach to collect and analyse ozone-depleting substances (ODS) and halogenated greenhouse gases (GHGs) in 100% humidity ambient air. The system uses automated canister sampling, a Nafion dryer for water vapour management, and GC-MS with selected ion monitoring to quantify 34 target compounds. The method achieves detection limits in the 0.08-0.30 ppt range, with good linearity, precision, and accuracy, meeting international requirements for monitoring these critical substances. The cryogen-free design and ability to handle highly humid samples make this a flexible and efficient solution for industrial ODS and GHG monitoring worldwide.