• 제목/요약/키워드: ethylenediaminedi aceticacid

검색결과 1건 처리시간 0.017초

몇가지 희토류원소와 Ethylenediaminediacetic acid간의 착물의 안정도상수 측정 (Studies on the Stability constants of complexes between rare earth elements and ethylenediaminediacetic acid)

  • 차기원;현인성;최현철
    • 분석과학
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    • 제14권4호
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    • pp.371-375
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    • 2001

  • 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.

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