Studies on the Stability constants of complexes between rare earth elements and ethylenediaminediacetic acid

Cha, Ki-Won; 차기원; Hyun, In-Seong; 현인성; Choi, Hyun-Chol; 최현철

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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

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14권 4호

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몇가지 희토류원소와 Ethylenediaminediacetic acid간의 착물의 안정도상수 측정

Studies on the Stability constants of complexes between rare earth elements and ethylenediaminediacetic acid

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

2001, v.14 no.4, pp.371-375

차기원
현인성
최현철

차기원, 현인성, & 최현철. (2001). 몇가지 희토류원소와 Ethylenediaminediacetic acid간의 착물의 안정도상수 측정. , 14(4), 371-375.

복사

Abstract

The stability constants of complexes between rare earth elements(Yb, Dy, Sm, Nd, Pr, Ce, La) and ethylenediaminediacetic acid(EDDA) have been measured for the separation of rare earth elements by potentiometric method. The $pk_1s$ of $MA^+$ complexes are in the range of 8.80-6.72 and the $pk_2s$ of $MA_2^-$ complexes are in the range of 7.43-4.37. The magnitude sequences of the stability constants are the reverse of the ionic size of rare earth elements.