title: Capillary electrophoretic determination of inorganic selenium species.
abstract: The performance of pyromellitic electrolyte for capillary zone electrophoresis of inorganic selenium species in the presence of selected common anions with indirect UV detection was investigated. The separation was achieved with pyromellitic electrolyte at pH 8.8 and hexamethonium hydroxide as the electroosmotic flow modifier. Obtained detection limits of 0.17 microg ml(-1) for Se(VI) and 0.29 microg ml(-1) for Se(IV) were improved by a factor of 5-7 in comparison with chromate electrolyte, which has been mainly employed for selenium analysis. Good resolution for nitrate-Se(VI) peaks were obtained.
authors.affiliation: Department of Chemistry, Warsaw University, Pasteura 1, 02-093 Warsaw, Poland.
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Dzierzgowska
authors.forename: Krystyna
authors.initials: K
authors.lastname: Pyrzyñska
authors.forename: Ewa
authors.initials: E
authors.lastname: Pobozy
mesh_terms: D019075:Electrophoresis, Capillary / Q000379:methods*; D012643:Selenium / Q000032:analysis*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D012643:Selenium