초록
비철특수합금중 아연(II) 구리(II)와 마그네슘(II)을 양이온 교환수지(Dowex 50w${\times}$8, 80-100 mesh)와 음이온 교환수지(IRA-400)을 이용하여 이온교환크로마토그라프로서 분리하는 방법을 연구 하였다. 이온교환수지는 25 ${\times}$ 2cm ID 칼럼에 넣고 흐르는 속도는 0.30 ml/min으로 조절하였다. 아연(II), 구리(II), 마그네슘(II)와 같은 비철금속 이온들을 분리하기 위한 좋은 용리액의 조건은 다음과 같다. 0.5M $NaNO_3$ (pH 3.1), 0.2~0.5M HCl + 50~90% Acetone과 1M HAc + 0.1M NaAcf(pH 3.7)였으며 0.1M NaAc + 1M NaAc(pH 3.7), 0.5M HCl + 50% Acetone이 가장 좋은 용리액으로 판명되었다. 분리된 용출액은 원자흡광 광도계로 측정하였으며 특히 아연 (II)은 음이온 교환수지에서 0.12N HCl과 1.5N $NH_4OH$ 수용액으로 분리하고 E.D.T.A로 적정하였다.
The purpose of this study was to develop a separation method of Zn(II), Cu(II) and Mg(II), by ion exchange chromatography using cation exchange resion (Dowex 50w${\times}$8, 80-100 mesh) and anion exchange (Amberlite IRA-400). Ion exchange resions were packed into 25 ${\times}$ 2cm ID column and flow rate was controlled to 0.30 ml/min. Good eluents for separation of nonferrous metal ions such as Zn(II), Cu(II), Mg(II) were as follow: 0.5M $NaNO_3$ (pH 3.1), 0.2~0.5M HCl + 50~60% Acetone, and 1M HAc + 0.1M NaAcf(pH 3.7) aqueous solution. The mixed solution of 0.1M NaAc(pH 3.7), 0.5M HCl + 50% Acetone were found to be the best eluent for step elution. Analysis of metals were determined by atomic absorption spectrophotometer. In addition, separated Zn(II) fraction was obtained by eluted with 0.12N HCl and 1.5N $NH_4OH$ aqueous solution. This solution was titrated by the E. D. T. A.