Simple Analysis Method to Measure Phosphine Residue in Grains, Herbs, and Spices Using Headspace Gas Chromatography 2021 - 05 - 12 Gas chromatograph (Shimadzu GC-2014 with Flame Photometric Detector) Column: Chromosorb 101, 2.6 mm i.d., 60/80 mesh, length 3.1 m Column temperature 1 :70 initial; after 6 minutes holding at initial temperature, temperature raised gradually to