固相微萃取-气相色谱-质谱联用分析环境水样中痕量有机磷农药  

Determination of organophosphorus pesticides in environmental water by solid-ph ase microextraction coupled with gas chromatography-mass spectrometry

作　　者：王新平[1] 杨云[1] 栾伟[1] 李攻科[1] 

机构地区：[1]中山大学化学与化学工程学院,广州510275

出　　处：《分析试验室》2003年第5期5-9,共5页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金资助项目(29977029);广东省自然科学基金资助项目(990292)

摘　　要：研究了固相微萃取(SPME) 气相色谱 质谱联用(GC MS)同时测定环境水样中二嗪农、甲基对硫磷、对硫磷和水胺硫磷4种有机磷农药(OPPs)的分析方法。选择聚丙烯酸酯(PA)萃取纤维,对SPME的条件如萃取时间、萃取溶液的pH值和离子强度、解吸温度、解吸时间和GC MS的条件进行了优化。对二嗪农和水胺硫磷方法线性范围为0.001～10μg L,对甲基对硫磷和对硫磷方法线性范围为0.001～100μg L。二嗪农、甲基对硫磷、对硫磷、水胺硫磷的检出限分别为0.015,0.020,0.013和0.039μg L。分析加标自来水、矿泉水和湖水样品,回收率在89.0%～102%之间,RSD在2.1%～14.1%之间。适合于环境水样中痕量OPPs的快速分析。A method for the determination of organophosphorus pesticides(OPPs) in e nvironmental water by solid-phase microextraction(SPME) coupled with gas chroma tography-mass spectrometry was developed. The studied OPPs were diazinon, methy l-parathion, parathion and isocarbophos. A polyacrylate (PA) fibre was u sed throughout the work. The experimental conditions of SPME, such as extraction time, pH and ion strength of the extraction solution, desorption temperature an d time were optimized. The linear ranges were from 0.001 to 10 μg/L for diazi non and isocarbophos, from 0.001 to 100 μg/L for methyl-parathion and parathio n. The detection limits were 0.015, 0.020, 0.013 and 0.039 μg/L for diazinon, m ethyl-parathion, parathion and isocarbophos, respectively. The method was used for the determination of trace OPPs in spiked tap water, mineral water and lake water samples, the recovery was from 89.0% to 102%, the RSD was from 2.1% to 1 4.1%.

关 键 词：固相微萃取 气相色谱-质谱联用 环境水样 痕量分析 有机磷农药 

分 类 号：X592[环境科学与工程—环境工程] X131.2