title: Selective determination of ammonium ions by high-speed ion-exclusion chromatography on a weakly basic anion-exchange resin column.
abstract: This paper describes an ion-exclusion chromatographic system for the rapid and selective determination of ammonium ion. The optimized ion-exclusion chromatographic system was established with a polymethacrylate-based weakly basic anion-exchange resin column (TSKgel DEAE-5PW) as the separation column, an aqueous solution containing 0.05 mM tetramethylammonium hydroxide (pH 9.10) as eluent with conductimetric detection for the analyte determination. Under the optimum chromatographic conditions, ammonium ion was determined within 2.3 min with a detection limit (S/N=3) better than 0.125 microM. Ammonium ion in rain and river waters was precisely determined using this ion-exclusion chromatographic system.
authors.affiliation: National Institute and Advanced Industrial Science and Technology at Seto, 110 Nishiibara-cho, Seto, Aichi 489-0884, Japan. masanobu-mori@aist.go.jp
authors.forename: Masanobu
authors.initials: M
authors.lastname: Mori
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Tanaka
authors.forename: Murad I H
authors.initials: MI
authors.lastname: Helaleh
authors.forename: Qun
authors.initials: Q
authors.lastname: Xu
authors.forename: Mikaru
authors.initials: M
authors.lastname: Ikedo
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Ogura
authors.forename: Shinji
authors.initials: S
authors.lastname: Sato
authors.forename: Wenzhi
authors.initials: W
authors.lastname: Hu
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Hasebe
mesh_terms: D000837:Anion Exchange Resins; D002138:Calibration; D002412:Cations; D002852:Chromatography, Ion Exchange / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D011109:Polymethacrylic Acids; D000644:Quaternary Ammonium Compounds / Q000032:analysis*; D012680:Sensitivity and Specificity; D014867:Water / Q000032:analysis; D014873:Water Pollutants / Q000032:analysis
chemical_list: D000837:Anion Exchange Resins; D002412:Cations; D007202:Indicators and Reagents; D011109:Polymethacrylic Acids; D000644:Quaternary Ammonium Compounds; D014873:Water Pollutants; D014867:Water; C030613:polymethacrylic acid; C027917:tetramethylammonium