title: Determination of ammonium, calcium, magnesium, potassium and sodium in drinking waters by capillary zone electrophoresis on a column-coupling chip.
abstract: This work deals with simultaneous determination of ammonium, calcium, magnesium, sodium and potassium in drinking waters by capillary zone electrophoresis (CZE) on a column-coupling (CC) chip with suppressed hydrodynamic and electroosmotic transports. CZE separations were carried out in a propionate background electrolyte at a low pH (3.2) containing 18-crown-6-ether (18-crown-6) to reach a complete resolution of the cations. In addition, triethylenetetramine (TETA) coated the inner wall surface of the chip channels. The concentration limits of detection (cLOD) for the studied cations ranged from 4.9 to 11.5 microg/l concentrations using a 900 nl volume of the sample injection channel. 93-106% recoveries of the cations in drinking waters indicate a good predisposition of the present method to provide accurate analytical results.
authors.affiliation: Department of Analytical Chemistry, Faculty of Natural Sciences, Comenius University, SK-84215 Bratislava, Slovakia. marian.masar@fns.uniba.sk
authors.forename: Marián
authors.initials: M
authors.lastname: Masár
authors.forename: Daniel
authors.initials: D
authors.lastname: Sydes
authors.forename: Milan
authors.initials: M
authors.lastname: Luc
authors.forename: Dusan
authors.initials: D
authors.lastname: Kaniansky
authors.forename: Heinz-Martin
authors.initials: HM
authors.lastname: Kuss
mesh_terms: D002118:Calcium / Q000032:analysis / Q000302:isolation & purification; D053801:Capillary Electrochromatography; D043844:Crown Ethers; D019075:Electrophoresis, Capillary / Q000295:instrumentation; D008274:Magnesium / Q000032:analysis / Q000302:isolation & purification; D019904:Polymethyl Methacrylate; D011188:Potassium / Q000032:analysis / Q000302:isolation & purification; D000644:Quaternary Ammonium Compounds / Q000032:analysis / Q000302:isolation & purification; D012964:Sodium / Q000032:analysis / Q000302:isolation & purification; D014266:Trientine; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D043844:Crown Ethers; D000644:Quaternary Ammonium Compounds; D014874:Water Pollutants, Chemical; D014867:Water; C015762:18-crown-6; D019904:Polymethyl Methacrylate; D012964:Sodium; D008274:Magnesium; D011188:Potassium; D014266:Trientine; D002118:Calcium