title: [Determination of trace level of bromate and perchlorate in drinking water by ion chromatography with microwave preconcentration].
abstract: A simple sample preconcentration technique for the determination of trace level of bromate and perchlorate in drinking water with ion chromatography is presented. With the hydrophobic anion-exchange column and a sodium hydroxide eluent in linear gradient, bromate and perchlorate can be determined in a single injection within 35 min. Prior to ion chromatographic analysis, the drinking water sample was treated with the OnGuard Ag cartridge to remove the superfluous chloride and concentrated in 20-fold with poly(tetrafluoroethylene)(PTFE) beaker in a domestic microwave oven in 15 min. The recoveries of the analytes are better than 90%. The detection limits for bromate, perchlorate, iodate and chlorate were 0.10 microgram/L, 0.20 microgram/L, 0.11 microgram/L and 0.21 microgram/L, respectively. The developed method is applicable for the quantitation of bromate and perchlorate in real drinking water samples.
authors.affiliation: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
authors.forename: Yong-Jian
authors.initials: YJ
authors.lastname: Liu
authors.forename: Shi-Fen
authors.initials: SF
authors.lastname: Mou
authors.forename: Bing
authors.initials: B
authors.lastname: Du
authors.forename: Ai-Wu
authors.initials: AW
authors.lastname: Lin
mesh_terms: D001959:Bromates / Q000032:analysis*; D002852:Chromatography, Ion Exchange; D008872:Microwaves; D010472:Perchlorates / Q000032:analysis*; D017670:Sodium Compounds / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
chemical_list: D001959:Bromates; D010472:Perchlorates; D017670:Sodium Compounds; D014874:Water Pollutants, Chemical; C031068:sodium perchlorate