Study on the Determination of Toxic Chemicals in Exhaust Gas (II): o-Chloronitrobenzene, m-Chloronitrobenzene, p-Chloronitrobenzene

A new method for the determination of ο-, m-, ρ-chloronitrobenzenes (CNBs) in exhaust gas was developed. The method was applicable to the analysis of CNBs in gas samples containing up to 30% of water. CNBs were collected with SEP PAK®PS2 cartridge after conditioning with η-hexane. CNBs were eluted with n-hexane and determined by capillary gas chromatography-mass spectrometry (GC/MS) and gas chromatography using flame thermoionic detector (GC/FTID) . Detection limits, relative standard deviations and recoveries of CNBs were 28.1-46.2 μg/m3, 3.62-8.94%, 85.6.95.0% in GC/MS and 155-200 μg/m3, 3.9-25.4%, 78.7-98.6% in GC/FTID.