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Method development and optimization for the determination of rare earth metal ions by capillary zone electrophoresis

✍ Scribed by M. Jimidar; T. Hamoir; W. Degezelle; D.L. Massart; S. Soykenç; P. Van de Winkel

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
770 KB
Volume
284
Category
Article
ISSN
0003-2670

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✦ Synopsis

The separation of rare earth metal ions by capillary zone electrophoresis in the presence of creatinine as W-absorbing background electrolyte and the complexing agent 2-hydroxyisobutyric acid was investigated. The separation is mainly influenced by the pH of the buffer and the concentration of the complexing agent. Both parameters were used in a central composite design to determine optimal conditions. After modelling of the migration behaviour, the optimal conditions were selected using a multi-criteria approach in which separation coefficient (a), sensitivity and analysis time were considered. Finally, the method was validated regarding its detection limit, linearity and reproducibility.

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