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The separation of 14 lanthanides by capillary zone electrophoresis was studied in the background electrolyte containing hydroxyisobutyric acid as complexing counter-ion and creatinine as a UV absorbing coion for indirect detection of lanthanide zones. A complete separation was achieved in less than 5 min and the applicability of the method for the analysis of real samples was demonstrated.

A method for the separation of cyclodextrins by capillary zone electrophoresis with indirect detection is described. It is based on the formation of inclusion complexes with benzoate which simultaneously forms a UV absorbing constituent of the background electrolyte used for the separation.

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