【摘要】 <正> 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1NH₂SO₄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^-6M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。样品更多还原

【Abstract】 The determination of Ru in H₂SO₄ by chronocoulometry is described. The platinum electrode servs as a working electrode. Ru is oxidized at +0.85V（vs SCE）after reducing various valency Ru into Ru（Ⅲ）with NaBH₄. The oxidation of Ru in the range of 10^-3 to 10^-6M is fixed for 20 sec, and a good linear relationship occurs between the quantity of electricitg and its concentration. Mostnoble metals and common metals do not interfere. The method above is employed to determine Ru in high Os. The measurement errcr of 10^-6M Ru is less than 10%.更多还原