文献类型：期刊文章

作　　者：李欣[1,2] 刘月银[3] 景小兵[3] 陈立仁[1]

机构地区：[1]中国科学院兰州化学物理研究所,兰州730000 [2]甘肃联合大学化学系兰州 [3]甘肃联合大学化学系

出　　处：《应用化学》

基　　金：甘肃省教育厅资助项目 (GJ2 0 0 1 0 1 0 16 )

年　　份：2003

卷　　号：20

期　　号：10

起止页码：1000-1002

语　　种：中文

收录情况：AJ、BDHX、BDHX2000、CAS、CSCD、CSCD2011_2012、JST、RSC、ZGKJHX、核心刊

摘　　要：A catalytic spectrophotometric method based on the catalytic effect of Pt(Ⅳ) on the oxidation of 2-(4-chloroe-2-phosphonophenylazo)-7-(4-acetylphenlazo)-1, 8-dihydroxy-3, 6-naphthalenedisulfonicacid(chlorophosphonazo-pA) with KIO 4 in acidic medium has been proposed for the determination of trace platinum. The reaction is performed directly in an aqueous solution and the optimal conditions are given. The detection limit is 5.0×10 -8 g/mL. The Beer′s law is obeyed in the range of 1.5×10 -7～3.0×10 -7 g/mL. The method has been applied to the determination of platinum in Pt-Pd ores with satisfactory results.

关 键 词：偶氮氯膦-pA  微量铂 测定  催化分光光度法

分 类 号：O657.32]