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在磷酸介质和加热条件下 ,钌 ( )对高碘酸钾氧化二安替比林对二甲氨基苯基甲烷 ( DAMAM)的显色反应有强催化作用 ,建立了催化动力学光度法测定痕量钌的新方法。方法的线性范围为 0～ 5.4 μg/L;检出限为 2 .1 6× 1 0 -8g/L;对 2μg/L的 Ru( )测定的 RSD为 2 .2 9% ( n=1 1 )。催化反应的表观活化能为 92 .2 3k J/mol。考察了 4 0多种共存离子的影响 ,大多数常见离子不干扰测定。本法已用于矿样中痕量钌的测定。
In phosphoric acid medium and heating conditions, ruthenium (Ⅱ) has a strong catalytic effect on the color reaction of p-dimethylaminophenylmethane (DAMAM) by potassium periodate oxidation, and the catalytic kinetic spectrophotometry New ruthenium method. The linear range of the method was from 0 to 5.4 μg / L with a limit of detection of 2.16 × 10 -8 g / L and RSD of 2 μg / L for Ru () was 2.29% (n = 1 1 ). The apparent activation energy of the catalytic reaction is 92.23k J / mol. The effect of more than 40 kinds of coexisting ions was examined, and most common ions did not interfere with the determination. This method has been used for the determination of trace ruthenium in mineral samples.