title: Anion selective exhaustive injection-sweep-micellar electrokinetic chromatography.
abstract: A selective on-line sample concentration technique of anion selective exhaustive injection (ASEI)-sweep-micellar electrokinetic chromatography (MEKC) was evaluated using a cationic surfactant. To suppress the electroosmotic flow, a polyacrylamide-coated capillary was introduced. Some aromatic carboxylic acids, dansyl amino acids, and naphthalene-disulfonic acids were used as test analytes. About 1,000- to 6,000-fold increases in detection sensitivity were obtained in terms of peak heights by ASEI-sweep-MEKC.
authors.affiliation: Faculty of Science, Himeji Institute of Technology, Kamigori, Hyogo, Japan. jbkim@sci.himeji-tech.ac.jp
authors.forename: J B
authors.initials: JB
authors.lastname: Kim
authors.forename: K
authors.initials: K
authors.lastname: Otsuka
authors.forename: S
authors.initials: S
authors.lastname: Terabe
mesh_terms: D000838:Anions / Q000032:analysis*; D020374:Chromatography, Micellar Electrokinetic Capillary / Q000379:methods*; D013056:Spectrophotometry, Ultraviolet; D013501:Surface-Active Agents / Q000737:chemistry
chemical_list: D000838:Anions; D013501:Surface-Active Agents