砷化氢-钼蓝光度法测定环境样品中砷  

Determination of Arsenic in Environmental Samples by AsH_3-molybdenumblue Spectrophotometry

作　　者：钱瑾[1] 王向明[1] 刘芳[1] 谢争[1] 

机构地区：[1]上海市环境监测中心,上海200030

出　　处：《环境监测管理与技术》2000年第3期31-32,共2页The Administration and Technique of Environmental Monitoring

摘　　要：介绍了用砷化氢 -钼蓝光度法测定水质、土壤和沉积物样品中砷 ,对测定条件中的砷化氢反应时间、显色酸度、碘 -碘化钾溶液用量、钼酸铵用量和干扰物质等进行了试验。方法检测限为 7μg/L ,平均回收率在 97%～ 10 5 %之间 ,相对标准差为 2 5 % ,摩尔吸收系数为 2 4× 10 4 。The paper introduced the determination of arsenic in water,soil and deposit by AsH 3-molybdenumblue spectrophotometry.The conditions were tested for reaction time of AsH 3,acidity of coloring,amount of I 2 KI solution,amount of (NH 4) 2MoO 4 and the interference.The detection limit was 7 μg/L,average recovery was 97%～105%, relative standard deviation was 2 5%,and the mole absorption coefficient was 2 4×10 4.

关 键 词：砷化氢 钼蓝 分光光度法 环境样品 砷测定 

分 类 号：X830.2[环境科学与工程—环境工程]