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本文分别提出以4.5N硫酸—3％氯化铵—0.00025M硫脲作为钌催化波的体系(阳极化曲线,Ep≈-0.83伏对S.C.E),以1.5N硫酸—0.1M碘化钾—0.00005M硫脲—碲(每10毫升底液中含碲5微克)作为锇催化波体系(阴极化导数曲线,Ep≈-1.05伏,对S.C.E)。在示波极谱上分别可测定低至0.00005微克/毫升的钌和0.0005微克/毫升的锇。观察了共存离子对钌、锇催化波的影响情况,讨论了这二催化波的性质并探讨它们的反应机理。与蒸馏法相结合拟定了适合于矿石分析中测定这二个微量元素的分析流程。
In this paper, we propose a system of 4.5 N sulfuric acid-3% ammonium chloride -0.00025 M thiourea as the ruthenium catalytic wave (anodic oxidation curve, Ep≈-0.83 V vs SCE), 1.5 N sulfuric acid -0.1 M potassium iodide -0.00005 M sulfur Urea-tellurium (5 μg of tellurium per 10 ml of bottom solution) was used as osmium catalytic wave system (cathodic derivative curve, Ep≈-1.05 volts for SCE). Ruthenium down to 0.00005 μg / mL and osmium at 0.0005 μg / mL were measured on oscillopolarography. The effect of coexisting ions on the catalytic wave of ruthenium and osmium was observed. The properties of the two catalytic waves were discussed and their reaction mechanism was discussed. In combination with the distillation method, an analytical procedure suitable for the determination of these two trace elements in the ore analysis was developed.