高效液相色谱-原子荧光联用测定天然水中烷基汞  

Determination of Alkylmercury in Natural Water by High Performance Liquid Chromatography Coupled with Atomic Fluorescence Detection

作　　者：赵云芝[1] 钱蜀 王俊伟[1] 李海霞[1] 万旭[1] 

机构地区：[1]四川省环境监测中心站,四川成都610041

出　　处：《中国环境监测》2011年第3期17-19,23,共4页Environmental Monitoring in China

摘　　要：应用在线紫外光照射-高效液相色谱分离-冷原子蒸发/氢化物发生-原子荧光光谱法(HPLC-UV-CV/HG-AFS)测定天然水中烷基汞,实验比较两种前处理方法-巯基棉富集和液液萃取,优化分析条件,建立一种简便、选择性好、高灵敏度分析天然水中烷基汞的方法。取1L水样时,甲基汞和乙基汞的检出限(3S/N)分别为0.3和0.6ng/L。以两种不同浓度标样进行6次平行测定,甲基汞和乙基汞的相对标准偏差(RSD)在2.8%～4.6%之间。The concentration of alkylmercury in natural water was determined by high performance liquid chromatography with on-line UV irradiation,generation of hydrides and cold vapor and atomic fluorescence detection（HPLC-UV-CV /HG-AFS）.A comparison was made between two pretreatment methods-preconcentration by sulphydryl cotton fibre and liquid-liquid extraction.A simple,high selectivity and sensitive method was proposed to determine hence alkylmercury in natural water through the optimum of analytical condition.The detection limit（3S /N） for methylmercury was 0.3 and 0.6ng /Lfor ethylmercury in 1L water.Precision was tested by analyzing two different concentration of standard samples for 6 determinations,the relative standard deviation（RSD） of methylmercury and ethylmercury found was in the range of 2.8% ～ 4.6%.

关 键 词：巯基棉富集和液液萃取 HPLC-UV-CV/HG-AFS 烷基汞 天然水 

分 类 号：X830.2[环境科学与工程—环境工程]