Retention Behavior of Lanthanide Complexes with $\alpha$ -hydroxyisobutyric Acid on Cation Exchanger

양이온 교환체에서 희토류원소와 $\alpha$-Hydroxyisobutyric Acid 착물들의 머무름 거동에 관한 연구

  • 조기수 (한국원자력연구소 원자력화학연구팀) ;
  • 한선호 (한국원자력연구소 Nuclear Chemistry Research Division) ;
  • 서무열 (한국원자력연구소 원자력화학연구팀) ;
  • 엄태윤 (한국원자력연구소 원자력화학연구팀) ;
  • 김연두 (충남대학교 화학과)
  • Published : 19901100


Retention behavior of lanthanide-$\alpha$HiBA complexes was studied on the cation exchanger (LC-18 coated with $C_{20}H_{41}SO_4^-$). An equation predicting retention of lanthanides in isocratic or gradient elution with sodium ion and $\alpha$-HiBA concentration was derived from ion exchange equilibria of metal-ligand complex system, respectively. The relations between log k' and log [Na$^+$] /log [$\alpha$-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 ($k'_{Ln}^{3+}, k'_{LnL}^{2+}, k'{LnL2+}) and stability constant (${\beta}_1$, ${\beta}_2$, ${\beta}_3$) of lanthanide-$\alpha$HiBA 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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