Abstract. An identification method for chemical warfare agents using a capillary column gas chromatograph equipped with a thermal desorption cold trap injector and three different detectors is described. The most reliable identification parameters were the retention indices. The relative photoionization detectorlflame ionization detector response ratios normalized to aniline gave additional information about all compounds, whereas the response ratios calculated for the thermionic flame ionization and thermionic photoionization detection gave reliable results only for the nerve agents soman and tabun.