停留-反相流动注射阻抑光度法测定超痕量铋(Ⅲ)  

The determination of ultra trace bismuth by reversed-phase flow injection inhibition spectrophotometry

作　　者：高芝[1] 高楼军[1] 柴红梅[1] 

机构地区：[1]延安大学化学与化工学院,延安716000

出　　处：《分析试验室》2010年第3期106-109,共4页Chinese Journal of Analysis Laboratory

基　　金：延安市科技计划(2008KS-15);延安大学研究生教育创新基金(yjcx200819)项目资助

摘　　要：基于在B-R缓冲溶液介质中,Bi(Ⅲ)对H2O2氧化孔雀石绿(MG)褪色反应的显著阻抑作用,建立了一种停留-反相流动注射阻抑光度法测定超痕量Bi(Ⅲ)的新分析方法,该方法的线性范围为0.001～0.54 ng/L,检出限为9.9×10-4ng/L,相关系数为0.9992。对0.001 ng/LBi(Ⅲ)平行测定11次的标准偏差为1.3%,进样频率为20.9次/h。该方法可直接用于人发和水中的超痕量Bi(Ⅲ)的测定,回收率为96.0%～102.0%。A new reversed-phase flow-injection inhibition discoloring spectrophotometric method using stopped-flow technique for the determination of ultra trace bismuth（Ⅲ） is described.This method is based on the inhibitory effect of bismuth（Ⅲ） on the reaction of malachite green（MG） and hydrogen peroxide in the britton-robinson buffer solution.The linear range of the determination is 0.001～0.54 ng/L for bismuth（Ⅲ） with a correlation coefficient of 0.9992,and the detection limit is 9.9×10-4 ng/L with the sampling rate of 20.9 times per hour.The standard deviation of eleven replicate measurements is 1.3% for 0.001 ng/L bismuth（Ⅲ）.The method has been applied to the determination of ultra trace bismuth（Ⅲ） in human hair and water samples.The recoveries are 96.0%～102.0%.

关 键 词：反相流动注射 阻抑光度法 孔雀石绿 Bi(Ⅲ) 

分 类 号：O657.3[理学—分析化学]