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AWWA WQTC65749
- Determination of Trace Concentrations of Bromate in Environmental Waters Using Two-Dimensional Ion Chromatography with Suppressed Conductivity Detection
- Conference Proceeding by American Water Works Association, 11/01/2007
- Publisher: AWWA
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Bromate is currently regulated at a maximum contaminant level (MCL) of 10 µg/L in drinking water using US Environmental Protection Agency (USEPA)Methods 300.1, 317.0, and 326.0. The European Union has established an MCL of 3 µg/L bromate for naturalmineral waters and spring waters treated by ozonation. Ion chromatography with suppressed conductivity detection,as described in USEPA Method 300.1 (B), is currently the most common method used to determine bromate in drinkingwaters. Determination of low parts-per-billion (ppb) concentrations by Method 300.1 can prove difficult due to thepresence of high concentrations of common anions, such as chloride, sulfate, and carbonate, which can produce poorbromate peak shapes and lower recoveries. This poster reports the results of a proposed USEPA method using two-dimensionalion chromatography (2-D IC) to determine low ppb concentrations of bromate in drinking waters. Thismethod permits the determination of <1 ppb bromate while eliminating high concentrations of interfering anions.
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