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研究了结晶紫-H2O体系浮选分离A u(SCN)4-的行为及与一些金属离子分离的条件。结果表明,在水溶液中,Au(Ⅲ)与结晶紫(CV)和硫氰酸铵形成不溶于水的三元缔合物A u(SCN)4-.CV+,此三元缔合物沉淀浮于水相上层形成界面清晰的液-固两相。当溶液中结晶紫和硫氰酸铵的浓度分别为7.0×1-0 4m ol/L和5.0×1-0 3mol/L时,Au(Ⅲ)可与R h(Ⅲ)、G a(Ⅲ)、Mn(Ⅱ)、A l(Ⅲ)、Ni(Ⅱ)、Cd(Ⅱ)、F e(Ⅱ)、Mg(Ⅱ)和Sn(Ⅳ)离子分离。该方法具有简便、快速和不污染环境等特点,在微量金的分离和富集分析中有一定的实用价值。
The behavior of flotation A u (SCN) 4- in crystal violet-H2O system and the separation conditions with some metal ions were studied. The results show that Au (Ⅲ) and crystal violet (CV) and ammonium thiocyanate form water-insoluble ternary complex A u (SCN) 4-CV + in aqueous solution, and this ternary complex precipitates and floats In the upper water phase to form a clear interface liquid - solid two-phase. When the concentrations of crystal violet and ammonium thiocyanate in the solution are 7.0 × 1-0 4 mol / L and 5.0 × 1-0 3 mol / L, Au (Ⅲ) can react with R h (Ⅲ), G a , Mn (Ⅱ), Al (Ⅲ), Ni (Ⅱ), Cd (Ⅱ), F e (Ⅱ), Mg (Ⅱ) and Sn (Ⅳ) ions. The method is simple, rapid and does not pollute the environment and other characteristics, in the separation and enrichment of trace gold analysis has some practical value.