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钌的价态、存在形式较复杂,给电分析测定带来许多困难,库仑分析虽有一些报导,但不够理想,计时库仑法具有恒电势库仑法的优点,又省时间。本文研究了在1NH_2SO_4底液中,将不同价态的钌用硼氢化钠还原为三价,于+0.85V(对饱和甘汞电极),在铂网电极上计时氧化为四价,10~(-3)～10～(-6)M的钌,固定时间20.0秒,所得电量与浓度间线性关系良好。对10~(-6)M的钌的测定结果误差在10％以下,多数贵金属和某些贱金属不干扰测定。样品
Ruthenium valence, the existence of more complex forms, the power analysis to bring many difficulties, although some reports Coulomb analysis, but not ideal, time coulometry has the advantages of coulometric potentiometry, but also save time. In this paper, 1NH_2SO_4 at the bottom of the liquid, the ruthenium with different valence sodium borohydride reduction to trivalent, at +0.85V (for saturated calomel electrode), the timing of the platinum net electrode oxidation to tetravalent, 10 ~ ( -3) -10 ~ (-6) M ruthenium, the fixed time 20.0 seconds, the resulting power and concentration of a good linear relationship between. For 10 ~ (-6) M ruthenium measurement error of 10% or less, most of the precious metals and some base metal does not interfere with the determination. sample