Detailed study on simultaneous separation of rare earth elements by capillary electrophoresis |
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Authors: | Sun Yali |
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Institution: | Centro de Investigacion en Energia, Universidad Nacional Autonoma de Mexico, Priv Xochicalco s/n Centro, Temixco Mor 62580, Mexico. ysun@graduate.hku.hk |
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Abstract: | Separation of all rare earth elements (REEs) by capillary zone electrophoresis was investigated in a system of alpha-hydroxyisobutyric acid (HIBA) as a main complex reagent and acetic acid (HAc) as an assistant complex reagent. In the combined system, ligand Ac- plays an important role in improving separation of Eu and Gd, and Y and Dy. The calculated ratio of Ac- to HIB- concentrations was compared and demonstrated that Eu and Gd, and Y and Dy tend to be separated at lower, and higher ratio of the two free ligands, respectively. An operational buffer system was developed for a complete separation of all REE ions. |
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Keywords: | Rare earth elements Europium Gadolinium Yttrium Dysprosium α-Hydroxyisobutyric acid Acetic acid Capillary zone electrophoresis |
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