Separation and direct UV detection of lanthanides complexed with pyridine-2-carboxylic acid by capillary electrophoresis.

Separation and detection of lanthanides by capillary zone electrophoresis in the presence of pyridine-2-carboxylic acid (picolinic acid) as UV-absorbing complexing agent were investigated. The resolution of partially complexed positively charged complexes is improved by using two buffer ligands competing with picolinic acid for metal ions. When… (More)