has proper occurrent part infrared absorption spectroscopy gas chromatography gas chromatography-infrared spectroscopy GC-IR Any method where a sample mixture is first separated by column chromatography where the mobile phase is a gas, then the absorption of radiation from the infrared region by the sample is measured. 2009-04-06T11:47:54Z GC/IR gas chromatography-infrared spectrometry gas chromatography infrared spectrometry gas chromatography infrared spectroscopy CHMO:0001262 https://orcid.org/0000-0001-5985-7429 GCIR GC IR