钌(Ⅲ)-二安替比林对溴苯基甲烷-高碘酸钾动力学光度法测定痕量钌

Ru(Ⅲ)-diantipyryl -(p-bromo) phenylmethane KIO_4 system for catalytic spectrophotometric determination of trace ruthenium

研究发现在磷酸介质中 ,钌 (Ⅲ )能催化二安替比林对溴苯基甲烷 (DApBM)与高碘酸钾的显色指示反应。研究了该催化反应的最佳试验条件及动力学参数 ,建立了一种测定痕量钌的新方法。该方法的测定范围为 0～ 6μg/L ,检测限为 2 2 0× 10 - 10 g/ml。用于矿样中痕量钌的测定 。

A new kinetric spectrophotometric method determination of ruthenium based on the catalytic effect of Ru on the oxidative color reaction of diantipyryl (p bromo) phenylmethane with potassium periodate in phosphoric acid is reported.The kinetic parameters of the catalytic reaction are also studied.The linear range of the method is 0～6μg/L,and the detection limit is 2 20×10 -10 g/mL The method has been applied to the determination of trace amounts of ruthenium in ores with satisfactory results.