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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。
In phosphoric acid medium, the trace amount of ruthenium (Ⅲ) catalyzed the chromogenic reaction of p-aminophenylmethane (DApAM) on the oxidation of diatpybenmine by potassium bromate. The optimum reaction conditions were studied and some kinetics A new method for the determination of trace ruthenium (Ⅲ) has been established. The detection limit is 2.10 × 10-9g / mL and Beer’s law is obeyed in the range of 0-20μg / L. The method is applied to Determination of trace ruthenium in precious metal concentrates with satisfactory results.