ABSTRACT
A few oxyhalide anions, especially, the disinfection by-products, perchlorate, chlorate, chlorite, and bromate are found in ground- and surface-water in the US The US Environmental Protection Agency (EPA) has promulgated analytical methods to measure oxyhalides that are well below their maximum contaminant levels in drinking water for compliance monitoring. Oxyhalides in water are best analyzed by ion chromatography. The US EPA Methods 300.1, 317.0, 321.0, and 326.0 are all based on ion chromatography. Several methods to measure trace concentrations of oxyhalide anions in aqueous phase have been reported. Most of these methods, however, are based on the ion chromatography technique. Oxyhalide anions can also be analyzed by other techniques such as using a liquid chromatography-tandem triple-quadrupole mass spectrometry (LC–MS/MS) system. The LC–MS/MS system is also simple and rapid and can simultaneously measure several anions including oxyhalides.
