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A new method was developed for the determination of iodide in saturated brine after in-line pretreatment by ion chromatography with pulsed amperometric detection. IonPac Cryptand C1 column was used to concentrate iodide in saturated brine sample, which was subsequently rinsed with 10 mM NaOH to remove interfering chloride. Third, NaOH at 0.5 mM concentration was used to elute iodide from the concentrator...