A Cryogen-Free Method for Monitoring Trace Greenhouse Gases in Air

This Application Note shows how Markes’ thermal desorption (TD) technology for analyzing ‘air toxics’ can also be applied to the detection of the most challenging ultra-volatile greenhouse gases, including tetrafluoromethane, hexafluoroethane, sulfur hexafluoride and nitrous oxide. Detection limits below 1 ppt are demonstrated for sulfur hexafluoride and hexafluoroethane, with excellent peak shape and linearity also being obtained.