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

Choi, Yoon-Seok; 최윤석; Choi, Hee-Seon; 최희선; Kim, Young-Sang; 김영상

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P-ISSN1225-0163
E-ISSN2288-8985
SCOPUS, ESCI, KCI

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P-ISSN 1225-0163
E-ISSN 2288-8985

e-Submission

Vol.10, No.5

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

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985

1997, v.10 no.5, pp.370-377

Choi, Yoon-Seok
Choi, Hee-Seon
Kim, Young-Sang

Choi, Y., Choi, H., & Kim, Y. (1997). Extraction Equilibria and Analytical Application of Metal-Dithizone Complexes(II) Partition and Extraction Equilibria into Chloroform. , 10(5), 370-377.

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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.