title: [Determination of trace and ultra-trace level bromate in water by large volume sample injection with enrichment column for on-line preconcentration coupled with ion chromatography].
abstract: A method for the determination of trace and ultra-trace level bromate in water by ion chromatography with large volume sample injection for on-line preconcentration was established. A high capacity Dionex IonPac AG23 guard column was simply used as the enrichment column instead of the loop for the preconcentration of bromate. High purity KOH solution used as eluent for gradient elution was on-line produced by an eluent generator automatically. The results showed that a good linear relationship of bromate was exhibited in the range of 0.05-51.2 μg/L (r ≥ 0.999 5), and the method detection limit was 0.01 μg/L. Compared with conventional sample injection, the injection volume was up to 5 mL, and the enrichment factor of this method was about 240 times. This method was successfully applied for several real samples of pure water which were purchased in the supermarket, and the recoveries of bromate were between 90%-100% with the RSDs (n = 6) of 2.1%-6.4% at two spiked levels. This method without pretreatment is simple, and of high accuracy and precision. The preconcentration can be achieved by large volume sample injection. It is suitable for the analysis of trace and ultra-trace level bromate.
authors.forename: Jing
authors.initials: J
authors.lastname: Liu
authors.forename: Qingqing
authors.initials: Q
authors.lastname: He
authors.forename: Lili
authors.initials: L
authors.lastname: Yang
authors.forename: Enyu
authors.initials: E
authors.lastname: Hu
authors.forename: Meifei
authors.initials: M
authors.lastname: Wang
mesh_terms: D001959:Bromates / Q000032:analysis*; D002852:Chromatography, Ion Exchange; D060766:Drinking Water / Q000032:analysis*
chemical_list: D001959:Bromates; D060766:Drinking Water