Determination of Chlorite, Chlorate and Bromate in Tap Water

At present, the disinfectants used for drinking water disinfection mainly include liquid chlorine, chlorine dioxide and ozone. Chlorite is a by-product of chlorine dioxide disinfection, chlorate is a non-by-product brought by chlorine dioxide raw material, and bromate is a disinfection by-product of ozone. These compounds may cause certain harm to human body. GB/T 5749-2006 hygienic standard for drinking water stipulates that the limits of chlorite, chlorate and bromate are 0.7, 0.7 and 0.01mg/L respectively. A high-capacity anion exchange chromatographic column can be used to simultaneously determine chlorite, chlorate and bromate in drinking water by ion chromatography with large volume direct injection.