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李欣, 陈立仁, 魏立山. 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[J]. 分析测试技术与仪器, 2003, (3): 186-188.
引用本文: 李欣, 陈立仁, 魏立山. 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[J]. 分析测试技术与仪器, 2003, (3): 186-188.
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LI Xin, CHEN Li-ren, WEI Li-shan. Catalytic Spectrophotometric Determination of Trace Osmium Based on the Catalytic Reaction of Chlorophosphonazo-pC and KIO4[J]. Analysis and Testing Technology and Instruments, 2003, (3): 186-188.
Citation: LI Xin, CHEN Li-ren, WEI Li-shan. Catalytic Spectrophotometric Determination of Trace Osmium Based on the Catalytic Reaction of Chlorophosphonazo-pC and KIO4[J]. Analysis and Testing Technology and Instruments, 2003, (3): 186-188.
shu

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 KIO4

    摘要
  • 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,结果满意.

     

    Abstract: A catalytic spectrophotometric method based on the catalytic effect of Os(Ⅳ)on the oxidation of chlorophosphonazo-pC with KIO4 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.

     

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