ウランとアルセナゾIII の錯体の組成

概要

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Previous investigations have shown that uranium (IV) can be determined very sensitively with Arsenazo III in 6 to 7M hydrochloric acid solutions and that uranium (VI) can be determined sensitively with the same reagent at pH 2. The purpose of the present work was to establish the empirical formula of the uranium (VI and IV) -Arsenazo III complexes under the analytically useful conditions. Results of the continuous variation (s) method and the polarographic method indicate that at pH 1.1 to 3.4 the complex is formed by one mole of uranium (VI) reacting with one mole of Arsenazo III. A result of the continuous variation (s) method indicates that in about 6 M hydrochloric acid solution the complex is formed by one mole of uranium (IV) reacting with two moles of Arsenazo III.
社団法人日本分析化学会の論文