氧化锆及铈-锆复合氧化物的阴离子交换和配体交换色谱性能  

Ion-exchange and Ligand-exchange Properties of Zirconia and Zirconia-ceria Stationary Phases

作　　者：胡玉玲[1] 冯钰 达世禄[2] 

机构地区：[1]中山大学化学与化学工程学院 [2]武汉大学化学与分子科学学院,武汉430072

出　　处：《应用化学》2002年第12期1123-1127,共5页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金资助项目 ( 2 9875 0 2 0 )

摘　　要：用溶胶 -凝胶法制备了 Zr O2 和 Zr O2 -* Ce O2 2种球形色谱固定相 ,研究了无机阴离子及取代苯甲酸化合物的色谱保留行为。当流动相 p H值小于氧化物的零电荷点时 ,固定相表现出明显的阴离子交换色谱性能 ,几种无机阴离子的洗脱顺序为 I- 、Br- 、NO- 3 、NO- 2 、Br O- 3 。由于配体交换作用的存在 ,苯甲酸及其衍生物在 Zr O2 和 Zr O2 -Ce O2 固定相上有较强保留 ,当流动相中存在竞争配体时 ,其保留值下降。采用醋酸盐缓冲液 ,苯甲酸及其衍生物能获得较为合适的保留值。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 -, NO - 3, NO - 2, BrO - 3. 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.

关 键 词：氧化锆 铈-锆复合氧化物 色谱性能 离子交换 配体交换 高效液相色谱法 分离 无机阴离子 填料 取代苯甲酸 

分 类 号：O657.72[理学—分析化学] O658[理学—化学]