毛细管柱气相色谱法测定工作场所空气中的三硝基甲苯  

Determination of trinitrotoluene in workplace air with capillary gas chromatography

作　　者：彭新元[1] 朱攀[1] 周方求[1] 吴锦如[1] 张攀[1] 

机构地区：[1]湖南省娄底市疾病预防控制中心,湖南娄底417000

出　　处：《中国卫生检验杂志》2007年第11期1991-1992,共2页Chinese Journal of Health Laboratory Technology

摘　　要：目的：建立工作场所空气中三硝基甲苯的气相色谱分析方法。方法：用玻璃纤维滤纸采集空气中的三硝基甲苯（TNT）,用溶剂洗脱（甲苯）后,经色谱柱分离,电子捕获检测器检测。结果：TNT在浓度为0.67×10^-3～0.45 mg/m^3时,相关系数r〉0.999,检出限为3.0×10^-3μg/ml,最低检出浓度为0.67×10^-3mg/m^3,相对标准偏差为1.3%～6.7%,平均洗脱效率为96.5%。结论：本方法可用于工作场所空气中TNT测定。Objective：To develop the gas chromatographic analytical method for determination of trinitrotoluene （TNT） in workplace air. Methods：The sample was absorbed with glass fiber filters paper and was desorpted by toluol. Trinitrotoluene was analyzed by capillary gas chromatography method with ECD detector. Results：The linear range of calibration curves for the determination for TNT was 0. 0.67×10^-3～0.45 mg/m^3 （ r 〉 0. 999 ）. The detection limit was 3.0×10^-3μg/ml and RSD = 1.3% 6. 7%. The efficiency was 96. 5%. Conclusion：This method can be used to determine the concentration of TNT in the workplace air.

关 键 词：溶剂洗脱 TNT 气相色谱法 

分 类 号：O657.71[理学—分析化学]