钍试剂催化动力学光度法测定痕量钌

Kinetic spectrophotometric determination of trace ruthenium with thoron

基于在磷酸和加热条件下 ,Ru( )对高碘酸钾氧化钍试剂 (TN)退色反应的催化作用 ,建立了一个测定钌的新催化光度法。用此法测定某些冶金产品和矿石中钌的含量 ,相对标准偏差为 1 .9%～ 2 .8% ,标准加入回收率 1 0 0 .4%～1 0 2 .6%

Based on the catalytic effects of ruthenium(Ⅲ) on the oxidation of thoron by KIO 4 in H 3PO 4 medium at 93±0.5℃,a new catalytic spectrophotometric method for the determination of trace ruthenium(Ⅲ) was established.The method has been successfully applied for the determination of trace amount of ruthenium in some ore and metallurgy products.The relative standard deviation is 1.9%~2.8% and the recovery is 100.4% ~ 102.6% .