鉛中の微量バリウムの電解分離およびバリウムのポーラログラフ分析 : アルカリ土類金属元素の分離に関する研究(第3報)

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There are many methods for the separation of barium from lead, but the present authors have investigated an electrolytic method for the separation of a small amount of barium in lead. After electrolysis, the barium and lead were determined by the polarographic method. The results are considered to be satisfactory.<BR>In order to separate a small amount of barium in lead by the electrolytic method, the controlled potential and the constant current methods were used. The results indicated that in each method barium remained in the solution within the determination error after lead was separated by approximately 99.799.9%.<BR>The polarographic determination of barium in calcium acetate solution was tried, but it was difficult to measure the diffusion current of barium because of the interference wave at about-1.7V <I>vs</I>. S. C. E.. It was found that the occurrence of the interference wave was caused by the carbon dioxide gas dissolved in the solution. After the carbon dioxide in the calcium acetate solution was removed, the linear relationship between the diffusion current and the concentration of barium was observed.
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