分析化学2001，Vol.29Issue(5)：546-548,3.
偶氮氯膦-mA-锇-高碘酸钾催化光度法测定微量锇
Catalytic Spectrophotometric Determination of Osmium (Ⅳ) Using Osmium (Ⅳ)-KIO4-Chlorophosphonazo-mA System
陈兴国 1胡之德 1许红平 2李江2
作者信息
- 1. 兰州大学化学化工学院,
- 2. 宁夏医学院化学教研室,
- 折叠
摘要
Abstract
A catalytic spectrophotometric method for the determination of micro amounts of osmium has been established based on the catalytic action of Os(Ⅳ) on the oxidation fading reaction of chlorophosphonazo-mA with KIO4 in alkaline-medium. The reaction conditions were optimized by orthogonal experimental design. The detection limit for osmium was 2.0 μg/L.Beer＇s law was obeyed in the range from 7.0 to 25.0 μg/L for Os(Ⅳ). The method has been applied to the determination of micro amounts of Os(Ⅳ) in concentrate of noble metals and secondary alloy,both of the relative errors were 0.9%. Recoveries varied from 95.38% to 106.0%.关键词
锇(Ⅳ),偶氮氯膦-mA,催化光度法,正交实验设计分类
化学化工引用本文复制引用
陈兴国,胡之德,许红平,李江..偶氮氯膦-mA-锇-高碘酸钾催化光度法测定微量锇[J].分析化学,2001,29(5):546-548,3.
