【摘要】 在磷酸介质和加热条件下，钌（Ⅲ）对高碘酸钾氧化而尔蓝（NB）有强催化作用，详细研究了动力学条件，建立了动力学光度测定钌的新方法，lg（Ao／A）与C_Ru（Ⅲ）呈线性关系的范围为0．008¹．2μg/L，检出限为0．008μg/L对0．008和0．8μg/LRu（Ⅲ）测定的RSD分别为14．30％和1．73％（n=11）。本催化反应对Rn（Ⅲ）、NB和KIO₄为一级反应，表观活化能为73.43kJ/mol，探讨了反应机理。考察了40多种共存离子的影响，大多数常见离子不干扰，13倍Os（Ⅷ）、30倍Ir（Ⅳ）、60倍（Ⅲ）和Rh（Ⅲ）、400倍Pt（Ⅳ）和Pd（Ⅱ）不干扰。本法已用于某些岩矿和冶金产品中钌的测定，结果满意。更多还原

【Abstract】 A kinetic method for the determination of trace ruthenium based on its catalysis to the oxidation of Nile blue （NB） by periodat in the H₃PO₄ medium and hot water bath is established. The Linear relation betwen the log（Ao/A） and the concentration for Ru（Ⅲ ） is foun to be0.008 1 .2 μg/L, and the detection limit is 0.008 μ/L of Ru（Ⅲ ）. The relative standard deviation for 11 replicate measurements of 0.008 and 0. 8 μg/ of Ru（Ⅲ ） is 14. 3% and 1. 7%, repectively. The catalytic reaction is first-order in Ru（Ⅲ ）, NB and KIO₄ and the apparent activation energy of catalytic reaction is found to be 73 .43 kJ/mol. The reaction mechanium is also discussed. The interference over 40 foreign ions were tested. There was no interference form 13-fold amount of Os（Ⅷ ）, 30-fold amount of Ir（Ⅳ ）,60-fold amount amount of Au（Ⅲ ）, Rh（Ⅲ ） and 400-fold of Pt（Ⅳ） and Pd（Ⅱ ）. The method has been applied to the determination of trace ruthenium in some ores and metallurgical products with satisfactory result.更多还原