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在磷酸介质和 90°C水浴条件下 ,Ru( )对高碘酸钾氧化二安替比林对二乙氨基苯基甲烷 (DAEAM)的显色反应有强催化作用 ,建立了动力学光度法测定痕量钌的新方法。方法的线性范围为 0～ 1 .6μg·L-1和 1 .6～ 4.4μg·L-1;检出限为 8.34× 1 0 -8g·L-1;对 3μg·L-1Ru( )测定的 RSD为 1 .79% (n=1 1 )。本催化反应表观活化能为 91 .67k J·mol-1,表观速率常数为 3.53×1 0 -3s-1。考察了 40多种共存离子的影响 ,大多数常见离子不干扰测定。方法已用于矿样中痕量钌的测定 ,结果满意
Under the condition of phosphoric acid medium and 90 ° C water bath, Ru () strongly catalyzed the oxidation of diantipyryl by DA and the color reaction of diethylaminophenylmethane (DAEAM). Kinetic spectrophotometry New method for the determination of trace ruthenium. The linear range of the method was 0-1.6 μg · L-1 and 1.66-4.4 μg · L-1 with a detection limit of 8.34 × 10 -8 g · L-1. The determination of 3 μg · L-1Ru The RSD was 1.79% (n = 1 1). The apparent activation energy of this catalytic reaction was 91.67 kJ · mol-1 with an apparent rate constant of 3.53 × 10 -3s -1. Examined the impact of more than 40 kinds of coexisting ions, the majority of common ions do not interfere with the determination. The method has been applied to the determination of trace ruthenium in ore samples with satisfactory results