title: Simultaneous determination of iodide and iodate in seawater by transient isotachophoresis-capillary zone electrophoresis with artificial seawater as the background electrolyte.
abstract: We developed capillary zone electrophoresis with transient isotachophoresis (ITP) as an on-line concentration procedure for simultaneous determination of iodide and iodate in seawater. The effective mobility of iodide was decreased by addition of 20 mM cetyltrimethylammonium chloride to an artificial seawater background electrolyte so that transient ITP functioned for both iodide and iodate. Limits of detection for iodide and iodate were 4.0 and 5.0 microg/l (as iodine) at a signal-to-noise ratio of 3. Values of the relative standard deviation of peak area, peak height, and migration times for iodide and iodate were 2.9, 1.3, 1.0 and 2.3, 2.1, 1.0%, respectively. The proposed method was applied to simultaneous determination of iodide and iodate in seawater collected at a pond at our university.
authors.affiliation: Research Institute for Marine Cargo Transportation, Kobe University of Mercantile Marine, 5-1-1 Fukaeminami-machi, Higashinada-ku, Kobe 658-0022, Japan.
authors.forename: Kuriko
authors.initials: K
authors.lastname: Yokota
authors.forename: Keiichi
authors.initials: K
authors.lastname: Fukushi
authors.forename: Sahori
authors.initials: S
authors.lastname: Takeda
authors.forename: Shin-Ichi
authors.initials: S
authors.lastname: Wakida
mesh_terms: D004573:Electrolytes / Q000737:chemistry*; D019075:Electrophoresis, Capillary / Q000379:methods*; D007452:Iodates / Q000032:analysis*; D007454:Iodides / Q000032:analysis*; D012623:Seawater / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D004573:Electrolytes; D007452:Iodates; D007454:Iodides