POTENTIOMETRIC DETERMINATION OF BROMIDE

2.1 Total solubilized bromide is determined potentiometrically using a bromide ionselective electrode (ISE) in conjunction with a double-junction reference electrode and a pH meter with an expanded millivolt scale or an ISE meter capable of being calibrated directly in terms of bromide concentration. 2.2 Standards and samples are mixed 50:1 with an ionic strength adjustment solution (ISA). Calibration is performed by analyzing a series of standards and plotting mV vs. bromide concentration on semilog paper or by calibrating the ion meter directly in terms of bromide concentration.