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Separation of metal ions by capillary electrophoresis with a complexing electrolyte

1993; Elsevier BV; Volume: 640; Issue: 1-2 Linguagem: Inglês

10.1016/0021-9673(93)80217-v

1873-3778

Youchun Shi, James S. Fritz,

Innovative Microfluidic and Catalytic Techniques Innovation

Excellent separations of metal ions can be obtained very quickly by capillary electrophoresis provided a weak completing reagent is incorporated into the electrolyte to alter the effective mobilities of the sample ions. Indirect photometric detection is possible by also adding a UV-sensitive ion to the electrolyte. Separations are described using phthalate, tartrate, lactate or hydroxyisobutyrate as the complexing reagent. A separation of twenty-seven metal ions was achieved in only 6 min using a lactate system. A mechanism for the separation of lanthanides is proposed for the hydroxyisobutyrate system.