加速溶剂提取-固相萃取净化-双柱双检测器气相色谱法测定大气中多种有机氯农药  

Determination of organochlorine pesticides in ambient air by ase-spe purification and gas chromatography coupled with dual columns and dual detectors

作　　者：侯晓虹[1] 吴宜曼[1] 郑兴宝[2] 张聪璐[1] 李晶[2] 王成辉[2] 曲健[2] 

机构地区：[1]沈阳药科大学制药工程学院,沈阳110016 [2]沈阳市环境监测中心站,沈阳110015

出　　处：《东北农业大学学报》2012年第8期87-93,共7页Journal of Northeast Agricultural University

基　　金：国家环境保护标准制修订项目(848)

摘　　要：选择大流量采样器采集大气样品,采用加速溶剂萃取仪进行样品萃取,弗洛里硅土固相萃取柱进行净化,以双柱双电子捕获检测器-气相色谱法测定环境空气中23种有机氯农药。采用内标法定量,23种有机氯农药和回收率指示物在10~300μg.L-1的质量浓度范围内呈现良好的线性关系（相关系数均大于0.997）,加标回收率在60.1%~106.3%,RSD在3.7%~20.3%（n=6）,方法检出量为0.013~0.200 ng.m-3。所建立的方法具有准确度高、重现性好、灵敏度高的优点,可用于监测环境空气中多种有机氯农药。An accurate,sensitive and reproducible method was studied for the determination of organochlorine pesticides（OCPs） in ambient air.Sampling was performed by high volume polyurethane foam sampling,accelerated solvent extraction was used for the sample extraction,solid phase extraction was used for the purification,and 23 OCPs and 2 surrogate standards were determined by gas chromatography coupled with dual columns and dual electron capture detectors.23 OCPs and 2 surrogate standards exhibited good linearity in the range of 10-300 μg.L-1,the correlation coefficients were larger than 0.997.The average recovery of the sample was 60.1%-106.3% with the relative standard deviations of 3.7%-20.3%（n=6） in ambient air.The method detection limit ranged from 0.013-0.200 ng.m-3.The results demonstrated that the established method with good accuracy,high sensitivity,and good reproducibility was suitable for the monitoring of 23 OCPs in ambient air.

关 键 词：环境空气 有机氯农药 双柱双电子捕获检测器 气相色谱法 

分 类 号：F767.2[经济管理—产业经济]