Abstract
Bromide ions in sea water and river water were determined by fluorescent X-ray spectrometry after precipitation as silver bromide. Ten ml of (1g Ag/l) silver nitrate solution was added to water sample containing bromide ion; this was allowed to stand for 30min. The silver bromide formed was gathered onto a 0.45μm membrane filter and the fluorescent X-ray intensity of bromide was measured. In the case of using 100ml of sample water the linear range of calibration curve was from 10 to 100μg/l, and the detection limit and the lower limit of determination were found to be 2.1 and 7.0μg/l, respectively.
This method was not affected by the coexistence of chloride or iodide up to a concentration of 10mg/l. This method was not influenced by sample size from 100 to 700ml, and was satisfactorily applied to determination of bromide in sea water and river water.
The concentration of bromide ions in the brine from the electrodialysis process was determined by means of this method. The result showed that the bromide ion can be easily concentrated by 1.8 times the chloride ion through the anion exchange membrane used in the electrodialysisprocess.
