ABSTRACT
Bromide is the anion of the halogen bromine, containing an extra electron. It is produced from the dissociation of bromide salts in water. It may occur in ground and surface waters as a result of industrial discharges or seawater intrusion. Bromide in water may be analyzed by one of the following three methods: phenol red colorimetric method, titrimetric method and ion chromatography. While the first method is used for low-level detection of bromide in the range of 0.1-1 mg/L, the concentration range for the titrimetric method is between 2 and 20 mg/L. The samples may be diluted appropriately to determine bromide concentrations at a higher range. Ion chromatography is used to analyze many anions including bromide. The bromide ion reacts with a dilute solution of sodium p-toluenesulfonchloramide (chloramine-T) and is oxidized to bromine that readily reacts with phenol red at pH 4.5–4.7.
