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Haloacetic Acids

Disinfection byproducts (DBP's) are a class of compounds formed through oxidation of organic matter in drinking water where chlorine is used. These compounds, including haloacetic acids (HAA’s), are known carcinogens and have been regulated for many years by the EPA and other regulatory agencies. All drinking water in the United States is currently monitored for the presence of DBP's and there are strict regulatory limits on these compounds for public safety. Working closely with the US EPA Office of Ground Water and Drinking Water, Dionex has co-developed a direct injection method for determination of HAA's that requires no sample preparation, significantly reducing time and effort typically required for determining HAA’s.

Chlorination of drinking water for disinfection results in the formation of haloacetic acids, several of which exhibit adverse carcinogenic effects in humans. Monochloro-, monobromo-, dichloro-, dibromo-, and trichloroacetic acids are regulated under the U.S. EPA Stage II Disinfection By Products Rule at a cumulative total concentration less than 60 ppb. Dionex and the U.S. EPA Office of Ground Water and Drinking Water are developing a direct-injection IC-MS/MS method for the determination of the nine chloro- and bromo-haloacetic acids. This IC-MS/MS method will save sample preparation time relative to the current method, which requires derivatization before analysis.