摘要
目的：建立工作场所空气中四溴化碳吸收液采样气相色谱测定方法。方法：选用无水乙醇作吸收液采集空气中四溴化碳，以毛细管气相色谱（ECD）测定。结果：空气中四溴化碳浓度在0～20mg／m^3（以采集3L空气样品计，相当于10ml无水乙醇吸收液采样管中四溴化碳溶液浓度0～6μg/ml）时，线性关系良好（r=0．9997，n=3），回归方程Y=35520．3X-2966．5；方法的检出限为0．086μg/ml（进样1μl,3倍噪声所相当的量）；最低检出浓度为0．29mg／m^3（以采集3．0L空气样品计）；相对标准偏差在0．4％～4．0％之间；采样效率92．7％；四溴化碳乙醇溶液封闭严密，4℃冰箱保存6d稳定。结论：本方法适用于工作场所空气中四溴化碳的浓度测定。
Objective：To establish an absorbing solution sampling and GC analytical method for carbon tetrabromide in the air of workplace. Methods：Carbon tetrabromide in the air of workplace was absorbed by 10 ml Ethanol, then analyzed by GC （ECD）. Results：The liner regression formula was Y=35520.3X-2966.5 between 0-20 mg/m^3 of target concentration in the air（r=0.9997）. The detection limit was 0.086μg/ml. The relative standard deviation was 0.4% -4.0%. The sampling efficiency was 92.7%. The tightly closed sampling could be stored for 6 day at 4℃ and its results still remained stable. Condusion：The method is compatible with concentration detection of carbon tetrabromide in the air of workplace.
出处
《中国卫生检验杂志》
CAS
2007年第12期2129-2130,2135,共3页
Chinese Journal of Health Laboratory Technology
基金
2006年卫生部卫生标准制修订项目
广东省医学科研课题(A2005760)
