催化动力学光度法测定钌

Catalytic Kinetic Spectrophotometric Determination of Ruthenium

在磷酸介质中，痕量钌（Ⅲ）对溴酸钾氧化二安替比林对氨基苯基甲烷（DApAM）的显色反应具有明显的催化作用，研究了反应的最佳条件，并测定了一些动力学参数，据此建立了一种测定痕量钌（Ⅲ）的新方法，其检测限为2．10×10－9g／mL，针含量在0－20μg／L内符合比尔定律，方法用于贵金属精矿中痕量钌的测定，结果满意。

A kinetic spectrophotometric method for the determination of trace ruthenium(Ⅲ)was established,which was based on its catalytic effect of Ru(Ⅲ) on the oxidative colour reaction of diantipyryl (P-amino)-phenymethane(DApAM) with potassium bromate in phosphoric acid medium.The optimum reaction conditions and some kinetic parameters were studied.The detection limit is 2. 10×10-9 g/mL. Beer's law is obeyed in the range of 0~ 20×10-6 g/L.This method has been applied to the determination of ruthenium in refined ores with satisfactory results.