Abstract:A technique for analyzing the bromine content in natural mineral water was developed. Regular mineral water did not require treatment, while carbonated mineral water was degassed using ultrasound. A mobile phase of 36 mmol/L nitric acid + 67 mmol/L ammonia water was utilized, and separation was achieved through anion chromatographic column. The form of bromine in natural mineral water is examined using HPLC-ICP/MS, and the total bromine content was confirmed via ICP-MS. The results indicated a bromate recovery 84.0% ~ 104%, with a relative standard deviation of 2.7%~ 4.2%; bromine ion recovery of 89.0%~102%, with a relative standard deviation of 2.3% ~5.1%; and a limit of quantitation of 2.0 μg/L. The recovery of total bromine ranged 93.2%~ 97.2%, with a relative standard deviation of 3.1%~ 5.8%, and a limit of quantitation of 2.0 μg/L. This method was applied to assess bromate and bromine ion levels in natural mineral water imported through the Shanghai port, and to trace the bromate production process in natural mineral water, offering an effective basis for risk monitoring and quality control of imported natural mineral water.