Citation:
HU Yu-Ling, FENG Yu-Qi, DA Shi-Lu. Ion-exchange and Ligand-exchange Properties of Zirconia and Zirconia-ceria Stationary Phases[J]. Chinese Journal of Applied Chemistry,
;2002, 19(12): 1123-1127.
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Zirconia and zirconia-ceria microspheres were synthesized as stationary phases for HPLC by a sol-gel process. The chromatographic behavior of inorganic anions and benzoic acid derivatives was systematically investigated. Zirconia and zirconia-ceria exhibit anion-exchange property only in the pH value below their zero change points. The elution order of five inorganic anions are I-, Br-, NO3-, NO2-, NO3-. Benzoic acid derivatives showed a more retention value on zirconia and zirconia-ceria mainly by ligand-exchange interaction, and the retention values were attenuated by the addition of a competing Lewis bases to the mobile phase. Moderate retention of benzoic acid derivatives on zirconia and zirconia-ceria can be obtained by using acetate buffer as a mobile phase.
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Keywords:
- zirconia,
- zirconia-ceria,
- ion-exchange,
- ligand exchange,
- HPLC
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