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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 34, Number 6
JKCSEZ 34(6)
December 20, 1990 

 
Title
Retention Behavior of Lanthanide Complexes with α-hydroxyisobutyric Acid on Cation Exchanger

양이온 교환체에서 희토류원소와 α-Hydroxyisobutyric Acid 착물들의 머무름 거동에 관한 연구
Author
Kihsoo Joe, Sun Ho Han, Moo Yul Suh, Tae Yoon Eom, Youn Do Kim

조기수, 한선호, 서무열, 엄태윤, 김연두
Keywords
Abstract
양이온 교환체 (LC-18 coated with C20H41SO4-)에서 희토류원소-αHiBA 착물계의 머무름 거동을 연구하였다. [Na+] 및 [α-HiBA]의 등용매 또는 기울기 용리에 따른 희토류원소의 머무름을 나타내는 관계식을 이온 교환 평형식으로부터 유도하였다. [Na+] 및 [α-HiBA]의 등용매 용리에 따른 크기성질(k')의 관계인 log k' vs log [Na+] 및 log k' vs log [α-HiBA]의 직선의 기울기 값에 대한 실험값과 계산값을 비교한 결과 서로 일치하였다. 위의 관계식으로부터 비선형 최소자승법으로 각 개별 착물들의 크기성질(k'Ln3+, k'LnL2+, k'LnL2+) 및 착물의 안정도 상수(β1, β2, β3)를 각각 구하였다. 희토류원소들의 크기성질(k')에 대한 실험값과 계산값의 상관계수가 0.9996보다 좋은 결과를 나타내었다.

Retention behavior of lanthanide-αHiBA complexes was studied on the cation exchanger (LC-18 coated with C20H41SO4-). An equation predicting retention of lanthanides in isocratic or gradient elution with sodium ion and α-HiBA concentration was derived from ion exchange equilibria of metal-ligand complex system, respectively. The relations between log k' and log [Na+] /log [α-HiBA) showed non-linearity in isocratic elution. In gradient elution a good linearity between log k' vs log R was obtained. The values of slopes (log k / log R) gave good agreements between calculation and experiment. Individual capacity factors (k'Ln3+, k'LnL2+, k'LnL2+) and stability constant (β1, β2, β3) of lanthanide-αHiBA complexes were calculated by the non-linear least square fittings using the retention equation. The correlation coefficients of lanthanides were shown better than 0.9996 between experiment and calculation.

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582 - 592
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