Extraction of macro amounts of triply charged metal cations (0.01–0.05 mol L−1) in aqueous phase-separating system antipyrine–sulfosalicylic acid–water containing no organic solvent is studied. Optimum conditions for phase separation are established and the influence of the concentrations of the major components, inorganic acids (H2SO4, HCl), salting-out agents, and the volume of the aqueous phase on the process in question is determined. It was found that the optimum antipyrine/sulfosalicylic acid ratio in the system was (1.5–2.0): 1.0. The introduction of inorganic salting-out agents causes the volume of the organic phase (0.8–1.8 mL) to increase to 2 mL and more. The extractability series of triply charged metal ions is as follows: Tl > Fe > Sc > In > Ga. It was shown that inorganic salts and hexamine influence the degree of extraction of metal cations and that inorganic acids and water affect the distribution mechanism and the composition of the complexes. The half-extraction pH values (pH1/2) of the cations are calculated and correlations between the pH1/2 values, the ionic radii of the cations, and the polarization ability of the metal ions are established.

中文翻译：

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水相分离体系安替比林-磺基水杨酸-水萃取三价金属阳离子

研究了在不含有机溶剂的水相分离系统安替比林-磺基水杨酸-水中提取大量三价金属阳离子（0.01-0.05 mol L-1）。确定相分离的最佳条件，并确定主要成分、无机酸（H2SO4、HCl）、盐析剂和水相体积的浓度对相关过程的影响。发现体系中最佳安替比林/磺基水杨酸比为（1.5-2.0）：1.0。无机盐析剂的引入导致有机相的体积 (0.8–1.8 mL) 增加到 2 mL 或更多。三价金属离子的可萃取性序列如下：Tl > Fe > Sc > In > Ga。结果表明，无机盐和六胺影响金属阳离子的提取程度，无机酸和水影响配合物的分布机制和组成。计算阳离子的半萃取 pH 值 (pH1/2)，并建立 pH1/2 值、阳离子的离子半径和金属离子的极化能力之间的相关性。