有機化合物のポーラログラフ的研究 : (第5報)サッカリンに就て

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The electro-reduction of o-sulphimide benzoic anhydride, its sodium compound and p-sulfon-amide benzoic acid has been investigated at the dropping mercury cathode with the polarographic arrangement. It has been found that the reduction potential and reduction mechanism of saccharin (anhydride) and its sodium compound are nearly equal. The wave-height of saccharin and its sodium salt in aqueous solutions of 0.1 N HC1 or 0.1 N H2SO4 are anomalously large compared with that in buffered solutions of other pH values. It seems partly due to the adsorption at the cathode interface, and the polarogram gives the adsorp-tion current when a solution of pH 1 is used. It has been ascertained that the wave-heights of saccharin are linearly proportional to the concentration of saccharin, and it is detectable in the solution of 0.1mg%. The rate of hydrolysis of saccharin is also studied and it is concluded that saccharin is most stable in a buffered solution of pH 7.
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