流动注射氢化物发生原子荧光光谱法同时测定海水养殖基地环境介质中As和Hg

应用氢化物发生原子荧光光谱技术,同时测定海水养殖基地环境介质底泥、海水和水产品中微量As和Hg。研究了载流、KBH4浓度对As和Hg测定的影响。在最佳实验操作条件下,As和Hg检出限分别为0.028 3μg/L、0.017 4μg/L。底泥中As和Hg的加标回收率分别为89.7%～112.6%和91.7%～110.8%,相对标准偏差分别为2.7%～5.3%和2.2%～4.3%;海水中As和Hg的加标回收率分别为90.2%～101.8%和90.0%～108.8%,相对标准偏差分别为3.1%～5.6%和2.1%～4.5%;水产品中As和Hg的加标回收率分别为89.6%～102.0%和89.2.0%～108.0%,相对标准偏差分别为2.6%～4.9%和1.7%～4.4%。

Simultaneous determination of arsenic and mercury of sea-water aquiculture base environment medium by flow injection Hydride Generation-Atomic Fluorescence Spectrometry

A systemic method for simultaneous determination of arsenic and mercury of sediment,seawater and fishery product in sea-water aquiculture base was developed by Hydride Generation-double channel Atomic Fluorescence Spectrometry(HG-AFS).Effects of flowing acid and concentration of KBH4 solution on the determination of As and Hg were studied and optimized.The detection limits were found to be 0.028 3 μg/L and 0.017 4 μg/L for As and Hg,respectively.The proposed method was applied to the determination of As and Hg.The values of RSD’s(n=10) were in the ranges of 2.7%～5.3%(As) and 2.2%～4.3%(Hg) in sediments,3.1%～5.6%(As) and 2.1%～4.5%(Hg) in seawater,2.6%～4.9%(As) and 1.7%～4.4%(Hg) in fishery product,respectively.Result s of recovery test were found in the ranges of 89.7%～112.6%(As) and 91.7%～110.8%(Hg) in sediments,90.2%～101.8%(As) and 90.0%～108.8%(Hg) in seawater,89.6%～102.0%(As) and 89.2.0%～108.0%(Hg) in fishery product,respectively.