Determination of Bromine and Iodine Speciation in Drinking Water Using High Performance Liquid Chromatography‐Inductively Coupled Plasma‐Mass Spectrometry |
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| Authors: | Wei Liu Hongxia Yang Bing Li Siqi Xu |
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| Institution: | 1. Chinese Academy of Geological Sciences, National Research Centre for Geoanalysis, Beijing 100037, China;2. Institute of Polar Environment, University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | A specific method for the determination of bromine and iodine species in drinking water was developed by using high performance liquid chromatography‐ICP‐MS. An ICS‐A23 ion chromatography column was chosen for the separation of species, with the mobile phase being 0.03 mol l?1 ammonium carbonate at a flow rate of 0.8 ml min?1. The detection limits for BrO3?, Br?, IO3? and I? were 0.032, 0.063, 0.008 and 0.012 μg l?1, respectively. Spectroscopic interferences were only observed in blank samples and mainly resulted from the argon‐potassium polyatomic ion (40Ar39K+). However, this interference was negligible because of the elution and complete separation from that of iodinate under optimised conditions. The method developed was successfully applied to twenty‐two samples of drinking water obtained from a supermarket. Results indicated that 36.4% of the samples had BrO3? concentrations exceeding the Chinese national limit for drinking water of 10 μg l?1. |
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| Keywords: | bromine iodine speciation drinking water HPLC‐ICP‐MS brome iode spé ciation eau potable HPLC‐ICP‐MS |
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