新银盐分光光度法测定尿中微量砷  

New silver salt spectrophotometry for the determination of micro-arsenic in urine

作　　者：乔静镕[1] 张敬[1] 

机构地区：[1]中国预防医学科学院劳动卫生与职业病研究所

出　　处：《卫生研究》1994年第4期207-209,共3页Journal of Hygiene Research

摘　　要：尿样采用一次加入混合酸与钼酸钠的催化消化法，使样品前处理简便，速度加快。消化样品中的砷化物用锌加硫酸还原成砷化氢气体，经硝酸银－聚乙烯醇－乙醇溶液吸收和新银盐分光光度法测定。方法测定范围为０．０１５～０．４０ｍｇ／Ｌ，相对标准偏差３．８％～４．７％，最低检测限０．０１３ｍｇ／Ｌ。尿样加标回收率为９０．０％～１０３．２％。尿砷标样测定结果相对误差为７．０％。用本法测定４６名非接触者尿砷浓度范围为０．０１４～０．１０２ｍｇ／Ｌ。For catalytic digestion the mix acid and sodium molybdate were added at the same time, this pretreatment of urine sample was simple and quick. The arsenic compound in the digested sample was reduced to arsenic hydride with zinc and sulfuric acid. It was absorbed by silver nitrate-polyvinyl alcohol-ethylalcohol solution and the silver salt fermed was determined with spectrophotometric method. The range of analysis was 0. 015～0. 4mg/L,the relative standard deviation was 3. 8%～4. 7%. The detection limit was 0. 13μg. The recovery of the standard addition with urine samples were 90. 0%～103. 2%. The relative error for determining urine snmple was 7. 0%. The concentration range of arsenic in 46 urine samples from nonexposed persons determined with this method were 0. 014～0. 102 mg/L.

关 键 词：砷 新银盐 分光光度法 尿液检查 

分 类 号：R135.1[医药卫生—劳动卫生]