加速溶剂萃取-气相色谱质谱联用法测定菜地土壤中多氯联苯  

Determination of PCBs in vegetable soil by GC/MS and accelerated solvent extraction

作　　者：李拥军[1,2] 温贤有[1,2] 陈坚文[1,2] 李选统 周霞[4] 

机构地区：[1]中山市农产品质量监督检验所,广东中山528403 [2]农业部生态农业重点开放实验室,广东广州510642 [3]中山市小榄镇农业服务中心,广东中山528415 [4]中山火炬职业技术学院,广东中山528436

出　　处：《广东农业科学》2011年第10期145-147,共3页Guangdong Agricultural Sciences

基　　金：国家自然科学基金(30670380);农业部生态农业重点开放实验室开放课题(2009k07);中山市科技计划项目(20092A219)

摘　　要：建立了加速溶剂萃取/气相色谱质谱联用技术分析菜地土壤中16种多氯联苯的新方法。优化后的萃取条件为:60%提取池的丙酮∶正几烷(体积比1∶1)为萃取剂,萃取时间为5 min。16种多氯联苯均具有良好的线性关系,相关系数不低于0.993,加标回收率为92.1%～104.3%,相对标准偏差为2.5%～7.7%,检出限为0.24～1.82 ng/mL。应用于菜地土壤中多氯联苯的检测,结果满意。A new method was developed for the determination of 16 PCBs in vegetable soil by accelerated solvent extraction coupled with gas chromatography-mass spectrometry.The extraction conditions were optimized.A good extraction efficiency was obtained by using 60% of the extraction cell acetone and hexane as extraction solvent,extracting for 5 min.The calibration curves for 16 PCBs all had good linear relationships with correlation coefficients not less than 0.993.The spiked recoveries ranged from 92.1% to 104.3% with relative standard deviations of 2.5%～7.7%.The limits of detection were in the range of 0.24～1.82 ng·mL-1.The method was applied in the determination for PCBs in vegetable soil with satisfactory results.

关 键 词：菜地土壤 多氯联苯(PCBs) 加速溶剂萃取 气相色谱质谱法 

分 类 号：X53[环境科学与工程—环境工程]