流动注射分光光度法测定废水中的砷  

Determination of Arsenic in Waste Water by Flow Injection Spectrophotometry

作　　者：吴英华[1] 孟杰[2] 马廷升[1] 任凤莲[2] 

机构地区：[1]怀化医学高等专科学校,湖南怀化418000 [2]中南大学化学化工学院,湖南长沙410083

出　　处：《皮革科学与工程》2009年第3期67-70,共4页Leather Science and Engineering

基　　金：湖南省教育厅科研基金资助项目(07C048)

摘　　要：运用流动注射分光光度法，系统研究了在酸性介质中砷（V）与钼酸铵生成的砷（V）钼杂多酸与丁基罗丹明B显色反应体系。并讨论了吸收曲线、酸度、显色剂与表面活性剂PVA的用量、泵转速、进样时间、共存组分及干扰元素对测定结果的影响。结果表明：As（V）在0—0．16mg／L范围内与吸光度有良好的线性关系，线性回归方程为A=0．0706＋1．4413c，线性相关系数为0．9943，相对标准偏差为0．36％，检测限为0．0075mg／L，对废水中的As（V）进行测定，加标回收率在96．84％～107．46％之间。It is found that in acid medium arsenic（V） could react with ammonium molybdate to form heteromolybdoarsenic acid. In this paper, the developing system between hteromolybdoarsenic acid and butyl rhodamine B was systematically investigated by flow injection spectrophotometry. The effect of some conditions, such as the absorption curve, acidity, chromogenic reagent , rotate speed, sampling time, coexisting ions and polyvinyl alcohol （PVA） were studied. The results showed that under the optimum conditions the linear range of As was 0. 0-0. 16 mg/L, the linear regression equation was A = 0. 0706 ＋ 1.4413c （ R = 0. 9943 ）, the detection limit was 0. 0075 mg/L, the relative standard deviation （BSD） was 0. 36% and the recovery of the method was founded to be 96. 84%-107. 46% when determined arsenic in the waste water.

关 键 词：砷 流动注射分光光度法 砷钼杂多酸 丁基罗丹明B 

分 类 号：X832[环境科学与工程—环境工程]