Air ; analysis ; Air Pollutants, Occupational ; analysis ; Ethane ; analogs & derivatives ; analysis ; Nitroparaffins ; analysis ; Uncertainty ; Workplace

OBJECTIVETo establish a gas chromatography method for detecting the concentration of 1,1-dichloro-1-nitroethane in air of workplaces.

METHOD1,1-dichloro-1-nitroethane in air of workplaces was collected by activated charcoal tube, absorbed using carbon disulfide and analyzed by Gas Chromatography (FID) with FFAP capillary column.

RESULTSThe linear rang of 1,1-dichloro-1-nitroethane in this method was 4.0-858.2 microg/ml, the linear regression formula was Y = 283X-1076, the correlation coefficient was 0.9999, the lowest detection concentration was 0.4 mg/m3 (3L sampling air), the relative standard deviation (RSD) was 1.8%-4.1%, the desorption efficiency was 88.5%-90.6%, the breakthrough volume was > 0.7 mg, the sampling efficiency was 100%, the samples could be kept at ambient temperature for at least 7 days.

CONCLUSIONThe indicators of this method were conformed to the requirements of "Guide for establishing occupational health standards--Determination methods of air chemicals in workplace". This method could be used to detect 1,1-dichloro-1-nitroethane in air of workplaces.

Air Pollutants, Occupational ; analysis ; Chromatography, Gas ; methods ; Ethane ; analogs & derivatives ; analysis ; Nitroparaffins ; analysis ; Workplace