摘要
建立液液萃取-气相色谱-质谱法同时测定地下水中9种多氯联苯的方法。以正己烷-二氯甲烷(体积比4:1)为萃取溶剂,采用液液萃取法提取目标物,在选定的仪器工作条件下测定,内标法定量。多氯联苯质量浓度在10~500μg/L范围内线性关系良好,相关系数均大于0.999。利用所建方法测定地下水中9种多氯联苯,检出限为0.12~0.28 ng/L。10、150、200 ng/L 3种质量浓度水平的空白加标样品的回收率均大于90%,测定结果的相对标准偏差为2.3%~9.1%(n=6)。该方法简便快捷、灵敏度高,满足地下水有机污染物分析质量控制要求。
A method for simultaneous determination of 9 polychlorinated biphenyls(PCBs)in groundwate by liquid-liquid extraction gas chromatography-mass spectrometry was established.Using n-hexane-dichloromethane(volume ratio was 4∶1)as the extraction solvent,the target substance was extracted by liquid-liquid extraction method,determined under the working conditions of the selected instrument,and quantified by internal standard method.The linear correlation coefficients of PCBs were more than 0.999 in the range of 10-500μg/L.The detection limit of the established method for the determination of 9 PCBs in groundwater was 0.12-0.28 ng/L.The recoveries of the blank spiked samples at 10,150 and 200 ng/L concentration levels were all more than 90%,and the relative standard deviations of the determination results were 2.3%-9.1%(n=6).The method is simple,rapid and sensitive,which can meet the requirements of quality control for the analysis of organic pollutants in groundwater.
作者
卢婷婷
石勇丽
曲亚辉
苏方方
曹宁宁
李佳昊
李和平
LU Tingting;SHI Yongli;QU Yahui;SU Fangfang;CAO Ningning;LI Jiahao;LI Heping(Henan Provincial Coal Geological Survey and Research Institute,Key Laboratory of Soil and Water Resources Conservation and Restoration in the Middle and Lower Reaches of Yellow River Basin,Ministry of Natural Resources,Zhengzhou 450052,China)
出处
《化学分析计量》
CAS
2022年第10期30-34,共5页
Chemical Analysis And Meterage
关键词
液液萃取
气相色谱-质谱法
多氯联苯
地下水
liquid-liquid extraction
gas chromatography-mass spectrometry
polychlorinated biphenyls
groundwater
