Study on the separation of Co²⁺ from Zn²⁺, Cd²⁺ by anion-exchange chromatography

Abstract

The separation of Co²⁺ from Zn²⁺, Cd²⁺ by anion-exchange chromatography was discussed. The chromatographic column containing anion resin 201 × 7 which was saturated with a solution of ammonium chloride. The effects of the eluant acidity and eluant composition on the separation were investigated. The results indicate that this anion-exchange chromatography is suitable to the separation of Co²⁺ from Zn²⁺, Cd²⁺, and the condition of separation is simple and convenient. When the column is saturated with NH₄Cl solution (2.0 mol/L, pH=4.0), the separation can be completed effectively. Zn²⁺ and Cd²⁺ can also be separated when different eluants are used and the pure solution with high concentration of Zn²⁺, Cd²⁺ respectively can be obtained easily.

Keywords

anion-exchange chromatography / Zn²⁺ / Cd²⁺ / Co²⁺ / separation

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