スルファミン酸とその誘導体の分析に関する研究 : 塩化アンモニウムおよびスルファミン酸アンモニウム共存下におけるスルファミドの定量

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This paper deals with the gas-volumetric determination of a small amount of sulfamide in the presence of ammonium chloride and ammonium sulfamate. It was found that sulfamide was decomposed by hypobromide in alkaline solution, giving N_2 gas quantitatively, whereas in the case of sulfamic acid, no gas was evolved. By addition of sodium tetraphenyl borate to a solution which contained both ammonium ion and sulfamate, white insoluble ammonium tetraphenyl borate was precipitated completely, leaving sulfamate in the solution. These facts above mentioned were applied to the gas-volumetric determination of sulfamide in the presencee of ammonium chloride and ammonium sulfamate, using Iwasaki's azotometry. This method eliminates the extraction procedure of sulfamide and is applicable to the determination of sulfamide in aqueous solution. The results obtained indicate that the relative error in the determination of sulfamide in samples containing known amounts (0.5-0.05mg.) was less than 1.5%.
明治大学の論文