[Determination of dimethyl sulfate in the air of workplace by GC-MS]

Objective: To establish a method to detect the concentrations of dimethyl sulfate in the air of workplace by GC-MS. Methods: DMS in the air of workplace adsorpted by Silicone tube, then desorped by acetone, add 1.0 ml of acetone, shake 1 min, placed after 30 min, the desorption solution qualitative and quantitative determination by gas chromatography-mass. Results: The calibration curves were liner in the range of 0.1-200.0 μg/ml. The within-run and between-run precisions were 2.6%-4.7% and 4.0%-9.0% respectively. The method detection limit is 0.1 μg/ml, the minimum detectable concentration is 0.02 mg/m(3) (in terms of sampling 4.5 L) . Add 1 ml of desorption liquid, place 30 min, the average desorption efficiency of more than 90%. Conclusion: This method has simple pretreatment, short analysis period, and optimized linear rage and limit of detection, and is suitable for the determination of DMS in workplace air.