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]怀化医专公共谋部,湖南怀化418000 [2]中南大学化学化工学院

出　　处：《怀化医学高等专科学校学报》2009年第1期25-28,共4页

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0．0～0．16mg／L浓度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 （RSD） 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：O657.2[理学—分析化学]