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砷的催化极潜测定虽有文献报导,但实际应用于矿石分析的尚不多见。作者在试验研究碲(Ⅳ)-碘化钾-硫酸体系中砷的催化波的基础上,拟定了锌精矿中砷的催化示波极谱测定方法。该方法不经分离,利用 EDTA 络合多种共存离子,可测定0.0x%～2%的砷,方法简便快速,获得了满意的结果。在 JP-1A 型示波极谱仪上,以滴汞电极为指示电极,饱和甘汞电极为参比电极,试验研究砷的催化波的结果表明;在4.32N H_2SO_4-4.8微克/毫升 Te(Ⅳ)-0.16N KI-0.001%动物胶底液中,砷呈现一
Although arsenic has been reported in the literature for the determination of catalytic polar potential, it is still rare to find a practical application in ore analysis. Based on the experimental study on the catalytic wave of arsenic in tellurium (Ⅳ) -potassium iodide-sulfuric acid system, the authors developed a catalytic oscillopolarographic determination of arsenic in zinc concentrate. The method without isolation, the use of EDTA complexed with a variety of coexisting ions, determination of 0.0x% ~ 2% of arsenic, the method is simple and rapid, and obtained satisfactory results. In the JP-1A oscilloscope polarographic instrument, the droplet mercury electrode as the indicator electrode, saturated calomel electrode as the reference electrode, the experimental study of arsenic catalytic wave results show that; in 4.32NH_2SO_4-4.8μg / ml Te ( Ⅳ) -0.16N KI-0.001% In animal glue solution, arsenic showed one