动态液相微萃取-气相色谱法测定水样中残留有机磷农药
Determination of Organo-phosphorous Pesticides in Water Using Dynamic Liquid Phase Micro-extraction Hyphenated With Gas Chromatography
摘 要
应用动态液相微萃取与气相色谱联用技术测定了水样中3种有机磷农药(敌敌畏、甲基对硫磷、对硫磷).考察了萃取溶剂、溶剂体积、萃取次数、水样pH值以及离子强度对液相微萃取的影响.该方法甲基对硫磷、对硫磷的线性范围在30~70 μg·L-1之间,敌敌畏的线性范围在40~70 μg·L-1之间,回收率在84.9%~103.0%之间,相对标准偏差(n=7)在5.1%~9.4%之间,检出限(3S/N)为26.5~35.7 μg·L-1.
液相微萃取
有机磷农药
GC
Liquid phase micro-extraction
Organo-phosphorous pesticides
Abstract
An analytical method based on dynamic liquid phase micro-extraction (DLPME) hyphenated with GC for the determination of three organo-phosphorous pesticides,dichlorovos,methylparathion and parathion in water was proposed in this paper.Effects of solvents,amount of solvent,number of times of extraction,pH and ion strength of the medium of DLPME were studied.Linearity were found in ranges of 30-70 μg·L-1 for methylparathion and parathion,and 40-70 μg·L-1 for dichlorovos.Recovery was found in the range of 84.9%-103.0%.RSD′s (n=7) were ranged in 5.1%-9.4% and DL′s (3S/N) were ranged in 26.5-35.7 μg·L-1.
中图分类号 O657.7
所属栏目 工作简报
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收稿日期 2008/2/6
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备注焦琳娟(1970-),女,安徽巢湖人,副教授,主要从事农残分析.
引用该论文: JIAO Lin-juan,HE Shu-qin. Determination of Organo-phosphorous Pesticides in Water Using Dynamic Liquid Phase Micro-extraction Hyphenated With Gas Chromatography[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2009, 45(1): 40～41
焦琳娟,何淑琴. 动态液相微萃取-气相色谱法测定水样中残留有机磷农药[J]. 理化检验－化学分册, 2009, 45(1): 40～41
被引情况:
【1】刘静,曾兴宇,烟卫,张艳萍,王意,刘小骐, "固相微萃取-气相色谱法测定水中有机磷农药",理化检验－化学分册 48, 950-952(2012)
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参考文献
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【2】He Y,Lee H K.Liquid-phase microextraction in a single drop of organic solvent by using a conventional microsyringe[J].Anal Chem,1997,69:4634-4640．
【3】李雅岚,陈世桢,陈新苗,等.SDE-GC-μECD分析水中挥发性卤代烃[J].分析测试学报,2005,24(4):67-69．
【4】康绍英,王海波,马铭,等.液相微萃取-高效液相色谱法测定尿样中的利多卡因[J].分析化学,2004,32(11):1421-1425．
【5】金晓英,袁东星.动态液相微萃取-气相色谱法测定水样中有机磷农药残留[J].分析化学,2005,33(3):347-350．
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