摘要
试验了加速溶剂萃取土壤中有机氯农药和多氯联苯残留的最佳条件。结果表明,采用正己烷-丙酮混合溶剂(体积比1:1)为提取剂,萃取温度100℃,压力为10.3MPa;采用弗罗里硅土固相萃取柱对样品净化,毛细管柱分离,用配有电子捕获检测器的气相色谱进行检测,平均加标回收率为83.6%～109.0%,相对标准偏差(RSD,n=11)为1.11%～5.88%,检出限为0.69～1.85ng/g。方法简单、快捷、经济,适应于土壤中的有机氯农药和多氯联苯的测定。
The optimum extraction condition was studied for organochlorine pesticides and polychlorinated biphenyls in soils using accelerated solvent extraction （ASE）.The sample was extracted with hexane/acetone （1：1,V/V） with extraction temperature of 100 ℃ and pressure of 10.3 MPa and cleaned up by solid phase extraction with Florisil column,followed by separation on a capillary column.The target organic pollutants were then quantitatively determined by gas chromatography using electron capture detection.The detection limits of the method was 0.69 ～ 1.85 ng/g and average recovery was 83.6% ～ 109.0% with precision of 1.11% ～ 5.88% RSD （n=11）.The method is simple,efficient,economical and suitable for the analysis of organochlorine pesticides and polychlorinated biphenyls in soil samples.
出处
《岩矿测试》
CAS
CSCD
北大核心
2010年第5期491-496,共6页
Rock and Mineral Analysis
基金
国土资源地质大调查--地下水污染测试技术研究项目资助(1212010634607)
关键词
加速溶剂萃取
气相色谱法
土壤
有机氯农药
多氯联苯
accelerated solvent extraction （ASE）
gas chromatography
soil
organochlorine pesticides
polychlorinated biphenyl
