Abstract
Based on selective sorption of bromide, bromoacetic acids (BAA) and bromomethanes on solid-phase extraction (SPE) cartridges, a sensitive and convenient method was developed for the determination of bromate in waters by inductively coupled plasma mass spectrometry (ICP–MS). Dionex OnGuard Ag and reversed-phase (RP) cartridges were tested for retention characteristics for bromide, BAA and bromomethanes. When a sample acidified with nitric acid was passed through an RP cartridge, BAA and bromomethanes were retained, afterwards bromide was absorbed as a precipitate of silver bromide and bromate was unretained when the nearly neutral sample passed a combination of Ag and H cartridges. After SPE pretreatment the recovery of bromate was 96–106%, and bromide remaining in the aqueous phase was found to be less than 0.06 μg L−1 when the original bromide concentrations were less than 5 mg L−1. Effectiveness of stacked Ag and H cartridges in removing bromide from chloride-containing samples was also examined. Common cations and other anions did not interfere with bromate determination. The detection limit for bromate is 57 ng L−1. This method has been applied to analyse waters from various sources, and the recovery of the spiked bromate was in the range of 92–107%.
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Cai, Q., Guo, ZX., Yu, C. et al. Bromate assay in water by inductively coupled plasma mass spectrometry combined with solid-phase extraction cartridges. Anal Bioanal Chem 377, 740–748 (2003). https://doi.org/10.1007/s00216-003-2151-3
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DOI: https://doi.org/10.1007/s00216-003-2151-3