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It should be noted that with ion chromatography interfering ions may mask the <br /> presence of bromide and effectively raise the detection limit of bromide. Known <br /> interfering ions are nitrate and chloride. To date all analyses have shown nitrate and <br /> chloride levels to be too low to cause interference. Colorometric detection is an <br /> alternative laboratory technique for measuring concentrations of bromide, but has a <br /> detection limit of approximately 0.5 ppm. <br /> sunny\wp\traci\2251\Workplan.693 16 <br /> Hal simon HYDRO-SEARCH <br />