AN 136: Determination of Inorganic Oxyhalide Disinfection Byproduct Anions in Drinking Water Using IC with the Addition of a Postcolumn Reagent for Trace Bromate Analysis

Instrument Type: IC

This application note describes an improved IC method to quantify low levels of oxyhalide DBP anions and bromide in reagent water, bottled water, and finished drinking water. The method uses a Dionex IonPac AS9-HC column and suppressed conductivity detection, followed by postcolumn addition of o-dianisidine (ODA) to enhance visible absorbance detection of the bromate ion. This method allows quantification of all the key oxyhalide anions and bromide at low µg/L levels by using conductivity detection, and the postcolumn addition of ODA. Also refer to AN168 for updated method.