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气相色谱法同时测定水中28种多氯联苯单体
引用本文:胡恩宇,杨丽莉,王美飞,母应锋.气相色谱法同时测定水中28种多氯联苯单体[J].环境监测管理与技术,2010,22(1):44-48.
作者姓名:胡恩宇  杨丽莉  王美飞  母应锋
作者单位:南京市环境监测中心站,江苏,南京,210013
摘    要:采用液液萃取-浓硫酸磺化净化-气相色谱电子捕获检测器同时测定水中28种多氯联苯单体,必要时利用质谱选择离子监测模式定性,考察了萃取溶剂种类和体积及盐析效应对测定的影响,比较了硫酸磺化和弗罗里硅土柱对萃取液的净化效果。方法在1.00μg/L~47.6μg/L范围内线性良好,当取样体积为200 mL时,方法检出限为0.001μg/L~0.002μg/L,基体加标回收率为95.8%~103%,相对标准偏差≤18.7%。

关 键 词:多氯联苯单体  液液萃取  气相色谱法  水质

Determ ination of28 Polychlorinated Biphenylsin Water by Gas Chromatography
HU En-yu,YANG Li-li,WANG Mei-fei,MU Ying-feng.Determ ination of28 Polychlorinated Biphenylsin Water by Gas Chromatography[J].The Administration and Technique of Environmental Monitoring,2010,22(1):44-48.
Authors:HU En-yu  YANG Li-li  WANG Mei-fei  MU Ying-feng
Affiliation:( Nanjing Environmental Monitoring Center, Nanjing, Jiangsu 210013, China )
Abstract:A method for 28 polychlorinated biphenyl compounds determination in water was established by LLE/cleanup with sulfuric acid/GC-ECD and qualitative analysis by MS-SIM as needed. The influencing factors were discussed such as properties and volume of extracting solvent, salting-out effect and cleanup results of extracting solvents by sulfonation in sulfuric acid or Florisil SPE tubes. The good linearity of the method was obtained from 1. 00 μg/L to 47. 6 μg/L, detection limits of the method from 0. 001 μg/L to 0. 002 μg/L at 200 mL sample, recoveries of matrix samples from 95.8% to 103% , RSD ≤18.7%.
Keywords:Polychlorinated biphenyls  LLE  Gas chromatography  Water quality
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