论文部分内容阅读
在磷酸和热水浴中 ,钌 (Ⅲ )对高碘酸钾氧化甲苯胺蓝的反应具有催化作用 ,据此建立了测定钌的新催化光度法。钌在 0～ 0 .0 5 0 μg/ 2 5ml范围内与催化反应速率有良好的线性关系 ,检出限为 5 .5 3× 10 - 5μg·ml- 1。对 0 .0 30 μg/ 2 5ml钌 (Ⅲ )测定的相对标准偏差为 2 .0 % (n =11)。该催化反应对钌 (Ⅲ )和甲苯胺蓝分别为一级反应 ,其表观活化能为 5 0 .2 6kJ·mol- 1。试验了 4 0多种共存离子的影响 ,大多数的常见离子不干扰。该方法用于岩矿和冶金产品中钌的测定 ,相对标准偏差为 2 .1%～ 2 .4 % ,标准加入回收率为 10 0 .1%～ 10 5 .4 %。
In phosphoric acid and hot water bath, ruthenium (Ⅲ) catalyzed the oxidation of toluidine blue by potassium periodate, and a new catalytic spectrophotometry was established for the determination of ruthenium. Ruthenium has a good linear relationship with the catalytic reaction rate in the range of 0 ~ 0.050 μg / 25ml with a detection limit of 5.53 × 10-5μg · ml-1. The relative standard deviation (RSD) was 2.0% (n = 11) for the 0 .0 30 μg / 2 5 ml ruthenium (Ⅲ) assay. The catalytic reaction of ruthenium (Ⅲ) and toluidine blue were first-order reaction, the apparent activation energy of 50.26kJ · mol-1. More than 40 kinds of coexisting ions were tested, and most of the common ions did not interfere. The method was applied to the determination of ruthenium in rock and mineral products. The relative standard deviation (RSD) was 2.1% ~ 2.4%, and the standard recovery was 0.10% ~ 105.5%.