|
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×8, 80-100 mesh) and anion exchange (Amberlite IRA-400). Ion exchange resions were packed into 25 × 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 NaNO3 (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 NH4OH aqueous solution. This solution was titrated by the E. D. T. A.
|