Speciation of iron using capillary electrophoresis inductively coupled plasma atomic emission spectrometry

The separation of iron species, e.g. Fe2(+)-Fe3+, Fe2+-Fe(phen)(3)(2+) and Fe2+-Fe3+, by mixing with complexing reagents of o-phenanthroline and EDTA, and Fe2+-Fe3+ with o-phenanthroline was developed by capillary electrophoresis inductively coupled plasma atomic emission spectrometry(CE-ICP-AES). The effects of electrophoresis conditions such as voltage, buffer solution pH, and complex concentration on iron species are discussed. Satisfactory separation conditions for iron speciation have been acquired. Cations and anions, containing complexing agents, do not interfere in the separation of iron species. The method has advantage to CE-UV.