Determination of Trinitrotoluene in Air by Capillary Gas Chromatography
- VernacularTitle:空气中三硝基甲苯的毛细管气相色谱测定法
- Author:
Hai-Lin REN
;
Yu-Quan PAN
;
- Publication Type:Journal Article
- Keywords:
Chromatography,gas;
Trinitrotoluene;
Workplace air;
Capillary gas chromatography;
Dichloromethane extraction
- From:
Journal of Environment and Health
2007;0(09):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To establish a capillary gas chromatography method for the determination of trinitrotoluene (TNT) in workplace air.Methods Using dichloromethane as the eluent,the air was drawn through a glass fiber filter to collect TNT,TNT was extracted from the filter with dichloromethane by an ultrasonic shaker,and the sample was analyzed by OV-17 elastic quartz electron capture detector capillary gas chromatography.Results Under the optimal condition,the lowest detection limit was 0.006 ?g/ml,the lowest detection concentration was 0.001 3 mg/m~3 (based on 45 L air sample).When the concentration of standard solution was 0.040-2.0 ?g/ml,the linear equation was good,r=0.999 8,RSDs were between 0.66%-3.62%,the recovery rates were 90.4%-95.5%.When sample was collected by fiberglass filter paper,the efficiency of desorption was more than 90%,and was stable for at least 7 days at 2℃-8℃.Conclusion This method is applicable to the determination of trinitrotoluene in workplace air.
