title: Separation of inorganic anions on a chemically bonded 18-crown-6 ether stationary phase in capillary ion chromatography.
abstract: Inorganic anions were separated on a chemically bonded 18-crown-6 ether (18C6E) stationary phase in capillary ion chromatography. In this study 18C6E groups were chemically bonded on silica gel via reaction with 3-glycidyloxypropyltrimethoxysilane, followed by reaction with 2-aminomethyl-18C6E. Analyte anions were separated in the ion-exchange mode based on the fact that the eluent cation was trapped on the 18C6E and it worked as the anion-exchange site. The eluent cation and eluent anion as well as the eluent concentration affected the retention of the analyte anions. Different selectivity was achieved by using an acetonitrile-rich eluent. The present stationary phase was applied for the determination of UV-absorbing anions contained in saliva samples.
authors.affiliation: Department of Chemistry, Faculty of Engineering, Gifu University, Gifu, Japan. take-t@gifu-u.ac.jp
authors.forename: Toyohide
authors.initials: T
authors.lastname: Takeuchi
authors.forename: Kimi
authors.initials: K
authors.lastname: Tokunaga
authors.forename: Lee Wah
authors.initials: LW
authors.lastname: Lim