自动液液萃取-分散固相萃取净化-气相色谱法测定水体中的多氯联苯

为快速、准确监测环境水体中多氯联苯（polychlorinated biphenyls,PCBs）的含量,建立了一种自动液液萃取、分散固相萃取净化、气相色谱电子捕获检测法同时测定水体中7种PCBs的方法。样品经正己烷液液萃取后,只需在萃取浓缩液中加入固相吸附剂除杂便可达到净化效果,并对分散固相萃取净化过程中吸附剂的种类和用量进行了优化。结果表明,7种PCBs在1.25-100μg/L质量浓度范围内组分含量与峰面积呈线性相关,相关系数为0.999 0-0.999 8,检测限为0.000 2-0.000 3μg/L。千岛湖水和岱衢洋海域海水中7种PCBs不同浓度加标水平回收率分别为74%-105%...

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Bibliographic Details
Published in浙江大学学报（农业与生命科学版） Vol. 42; no. 1; pp. 99 - 106
Main Author 胡红美 郭远明 郝青 孙秀梅 金衍健 钟志 张小军
Format Journal Article
LanguageChinese
Published 浙江省海洋水产研究所/浙江省海洋渔业资源可持续利用技术研究重点实验室,浙江舟山,316021 2016
Subjects
分散固相萃取净化
多氯联苯
气相色谱电子捕获检测法
水体
自动液液萃取
分散固相萃取净化
gas chromatography-electron capture detector
气相色谱电子捕获检测法
水体
polychlorinated biphenyls
自动液液萃取
多氯联苯
automated liquid-liquid extraction
dispersive solid phase extraction
water
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ISSN1008-9209
DOI10.3785/j.issn.1008-9209.2015.07.102

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Summary:为快速、准确监测环境水体中多氯联苯（polychlorinated biphenyls,PCBs）的含量,建立了一种自动液液萃取、分散固相萃取净化、气相色谱电子捕获检测法同时测定水体中7种PCBs的方法。样品经正己烷液液萃取后,只需在萃取浓缩液中加入固相吸附剂除杂便可达到净化效果,并对分散固相萃取净化过程中吸附剂的种类和用量进行了优化。结果表明,7种PCBs在1.25-100μg/L质量浓度范围内组分含量与峰面积呈线性相关,相关系数为0.999 0-0.999 8,检测限为0.000 2-0.000 3μg/L。千岛湖水和岱衢洋海域海水中7种PCBs不同浓度加标水平回收率分别为74%-105%和71%-107%,相对标准偏差分别为3.1%-6.2%和3.5%-5.9%（n=5）。本方法简单快速,高效,基体干扰小,灵敏度、准确度、精密度均满足水体中PCBs的定量分析要求。
Bibliography:33-1247/S
HU Hongmei, GUO Yuanming, HAO Qing, SUN Xiumei, JIN Yanjian, ZHONG Zhi, ZHANG Xiaojun （Marine Fishery Institute of Zhejiang Province/Key Laboratory of Sustainable Utilization of Technology Research for Fishery Resource of Zhej iang Province, Zhoushan 316021, Zhej iang , China）
Polychlorinated biphenyls （PCBs） are a group of synthetic organic compounds and comprise a family of 209 possible congeners. PCBs are hazardous due to their persistence, hydrophobic character and toxic properties. Although they have been banned on a global scale since 1972, PCBs are still routinely found throughout the world and cause many ecotoxicological problems. Therefore, it is necessary to continue developing analytical methods for the analysis of PCBs in environmental samples. Analysis of PCBs in water is usually performed by gas chromatography （GC） or gas chromatography-mass spectrometry （GC-MS） combined with liquid-liquid extraction （LLE）, solid phase extraction （SPE）, solid phase disk extraction （SPDE）, solid phase mic
ISSN:1008-9209
DOI:10.3785/j.issn.1008-9209.2015.07.102