Ru(Ⅲ)-DAmMM-KIO_4催化光度法测定痕量Ru(Ⅲ)  

The catalytic spectrophotometric methods for the determination of ruthenium by the Ru(Ⅲ)-diantipyl-(m-methoxyl)-phenylmethane KIO_4 system

作　　者：侯能邦 李祖碧[2] 徐其亨[2] 

机构地区：[1]云南曲靖师范专科学校化学系,655000 [2]云南大学

出　　处：《黄金》2001年第1期50-52,共3页Gold

摘　　要：在磷酸介质及加热条件下 ,钌 (Ⅲ )催化高碘酸钾氧化二安替比林基 - ( 3-甲氧基 )苯基甲烷 (DAmMM) ,反应速率与钌质量浓度呈线性的范围为 0～ 8 4 μg L ,检出限为 1 0 9× 10 -9g ml,催化反应的表观活化能为 69 10kJ mol。试验了 30多种共存离子的影响 ,只有Ir干扰测定 ,其它贵金属和铁均不发生干扰。该方法已用于岩矿中痕量钌的测定 ,其结果令人满意。A new kinetic spectrophotometric method has been developed for the determination of ruthenium based on its catalytic effect of the oxidation reaction of diantipyl-(m-methoxyl)-phenylmethane (DAmMM) with KIO 4。The linear range for the determination of ruthenium(Ⅲ) is 0～8.4μg/L,and the detection limit is 0.00109μg/L.The apparent activation energy of this catalytic reaction is 69.10kJ/mol.Except that Ir(Ⅳ) has an interference effect,there is almost no foreign ions interfering the determination by this method.This method has been successfully applied to the determination of trace amount of ruthenium in some ores.

关 键 词：二安替比林基 苯基甲烷 钌 高磺酸钾 催化光度法 动力学分析 测定 

分 类 号：O614.821[理学—无机化学] O657.32[理学—化学]