"Concentration of trichloromethane {chloroform CAS 67-66-3} per unit volume of the water body [dissolved plus reactive particulate phase] by purging, cryogenic trapping and gas chromatography-mass spectrometry"@en . . "SDN:P01::TCMXGCTX" . "Trap/purge gas chromatography mass spectrometry (unfiltered)"@en . .