Tenax TA吸附/二次热解吸/毛细管气相色谱法测定环境空气中苯系物的方法  

Tenax TA adsorption/thermal desorption/capillary gas chromatography for monitoring BTX in the ambient air

作　　者：徐东群[1] 刘晨明[1] 张爱军[1] 董小艳[1] 韩克勤[1] 王桂芳[1] 唐志刚[1] 

机构地区：[1]中国疾病预防控制中心环境与健康相关产品安全所,北京100021

出　　处：《卫生研究》2004年第4期425-427,共3页Journal of Hygiene Research

基　　金：科技部公益基金重点课题 (No .2 0 0 1DA1 0 0 0 1 ) ;科技部"十五"攻关重点课题 (No.2 0 0 1BA70 4B0 1 )资助

摘　　要：目的　建立环境空气中低浓度苯系物的分析方法 ,研究最佳解吸条件和分析条件。方法　采用TenaxTA吸附 二次热解吸 毛细管气相色谱法。结果　本方法对苯系物测定的相对标准偏差在 4 30 %～1 0 81 %之间 ,具有良好的重现性。苯系物的加标回收率大于 94 %。苯、甲苯、对二甲苯、邻二甲苯的最低检出浓度分别为 0 0 9、0 1 2、0 2 3、0 2 6 μg m3。Objective\ A method for monitoring low concentration of benzene, toluene, p xylene, o xylene(BTX) in ambient air is set up. The optimum of desorption and analysis parameter is selected. Methods Tenax TA adsorption/thermal desorption/ capillary gas chromatography is used. Results The relative standard deviation of benzene, toluene, p xylene, o xylene in ambient air are from 4.30% to 10.81%, which shows this method has good repeatability. The recoveries of BTX are more than 94%. The minimum detectable concentration to benzene, toluene, p xylene, o xylene is 0 09,0 12,0 23,0 26μg/m 3 respectively. Conclusion This method can be used to determinate low concentration of BTX in ambient air.

关 键 词：TenaxTA 热解吸 苯系物 测定 

分 类 号：X830.2[环境科学与工程—环境工程] R994.6[医药卫生—毒理学]