摘要
要得到城市生活污水中多氯联苯的准确含量,必须选择合适的前处理方法.采用C18固相萃取柱富集生活污水中的PCBs,选择最佳用量为10 mL的组合萃取剂丙酮+正己烷(体积比为1∶1)进行萃取,结合浓硫酸洗涤、硅胶柱层析净化和无水硫酸钠干燥的方式深度提取PCBs;以EPA推荐的7种PCBs为外标物,采用GC-MS法对样品中的PCBs进行定性和定量分析.结果表明:城市生活污水中7种PCBs总量为27.75 ng/L.分析方法的相对标准偏差为1.6%~8.8%,回收率为84%~103%,检测限达到0.014μg/L.
The optimum pretreatment process is especially required in order to get the exact concentration of PCBs in municipal sewage.In the paper,C18 solid-phase extraction(SPE) columns were adopted in the enriching of PCBs in Harbin municipal sewage,and the target compounds were extracted with mixed extractant of acetone and n-hexane of 1∶1 in the optimum dosage of 10 milliliter.And the extract was further purified with sulfuric acid,silica gel and anhydrous sodium sulfate.GC-MS was applied in the identification an...
出处
《北京工业大学学报》
EI
CAS
CSCD
北大核心
2009年第8期1084-1089,共6页
Journal of Beijing University of Technology
基金
国家“八六三”计划资助项目(2006AA062308)
