Extraction Equilibria and Analytical Application of Metal-Dithizone Complexes(II) Partition and Extraction Equilibria into Chloroform

디티존 금속착물의 용매추출평형과 분석적 응용(제2보) 클로로포름 용매에 대한 분배 및 추출평형

  • 최윤석 (고려대학교 대학원 화학과) ;
  • 최희선 (수원대학교 자연과학대학 화학과) ;
  • 김영상 (고려대학교 자연과학대학 자연과학부)
  • Received : 1997.06.02
  • Published : 1997.10.25

Abstract

The several fundamental parameters on the solvent extraction of Co(II), Cu(II) and Zn(II) with dithizone were investigated. The value of $K_{a1}/K_p$ of dithizone(at $25^{\circ}C$) between an aqueous phase and a chloroform was found to be $4.72{\times}10^{-11}$. And the mole ratios of metal ion to dithizone in its metal complexes were determined by mole ratio method. The extractibilities(%) for metal-dithizone chelates were obtained from the extraction equilibria of metal-dithizone complexes between an aqueous phase and a chloroform as follows. Co(II) : 92.3% at pH 8.0 : Cu(II) : 97.1% at pH 4.0 and Zn(II) : 99.0% at pH 7.0. And also, in optimum experimental conditions the extraction constants of Co(II), Cu(II) and Zn(II) were examined.

Keywords

dithizone;extractability;distribution ratio;extraction constant

Acknowledgement

Supported by : 교육부 기초과학연구소