title: Fast and high-resolution ion chromatography at high pH on short columns packed with 1.8 microm surfactant coated silica reverse-phase particles.
abstract: Rapid ion chromatographic separations of small inorganic anions are performed on columns packed with high-pH resistant Zorbax Extend-C18 1.8 microm silica particles. Seven anions (iodate, chloride, nitrite, bromide, nitrate, phosphate, sulphate) are separated with 1.3 and 2 cm long x 0.46 cm I.D. C18 columns coated with the surfactant didodecyldimethylammonium bromide (DDAB). A 40 s separation is achieved at 2 mL/min with a 2.5 mM 4-hydroxybenzoic acid eluent at pH 10. Finally, the DDAB removal procedure is improved to eliminate the pressure build-up caused by precipitation of the surfactant in the column upon uncoating.
authors.affiliation: Department of Chemistry, Gunning/Lemieux Chemistry Centre, University of Alberta, Edmonton, Alta. T6G 2G2, Canada.
authors.forename: Sarah
authors.initials: S
authors.lastname: Pelletier
authors.forename: Charles A
authors.initials: CA
authors.lastname: Lucy
mesh_terms: D000838:Anions / Q000737:chemistry; D002254:Carbonates / Q000737:chemistry; D002853:Chromatography, Liquid / Q000295:instrumentation* / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D010226:Parabens / Q000737:chemistry; D000644:Quaternary Ammonium Compounds / Q000302:isolation & purification; D012680:Sensitivity and Specificity; D012822:Silicon Dioxide / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry*; D013997:Time Factors
chemical_list: D000838:Anions; D002254:Carbonates; D010226:Parabens; D000644:Quaternary Ammonium Compounds; D013501:Surface-Active Agents; C046112:didodecyldimethylammonium; D012822:Silicon Dioxide; C038193:4-hydroxybenzoic acid