锇(Ⅳ)-高碘酸钾-偶氮氯膦-pC催化分光光度法测定痕量锇的研究  

Catalytic Spectrophotometric Determination of Trace Osmium Based on the Catalytic Reaction of Chlorophosphonazo- pC and KIO_4

作　　者：李欣[1] 陈立仁[1] 魏立山[2] 

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

出　　处：《分析测试技术与仪器》2003年第3期186-188,共3页Analysis and Testing Technology and Instruments

摘　　要：在1.0mol/L硫酸介质中,微量锇(Ⅳ)的存在对KIO4氧化偶氮氯膦-pC的褪色反应有明显的催化作用,据此建立微量锇的催化光度分析法 方法的检出限为0.0002μg/mL,锇(Ⅳ)的含量在0.0006～0.003μg/mL之间有良好的线性关系,反应在水相中进行,应用于贵金属精矿中锇的测定。A catalytic spectrophotometric method based on the catalytic effect of Os(Ⅳ)on the oxidation of chlorophosphonazo- pC with KIO4 in acidic medium has been proposed for the determination of trace osmium. The reaction was carried out directly in aqueous solution . The detection limit is 0.000 2 μg/mL and the Beer′s law is obeyed in the range of 0.000 6～0.003 μg/mL . The method proposed has been applied to the determination of Osmium in noble metals ores with satisfactory results.

关 键 词：锇(Ⅳ) 高碘酸钾 偶氮氯膦-pC 催化分光光度法 测定 痕量元素 

分 类 号：O614.824[理学—无机化学] O657.3[理学—化学]