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

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.