ICP-MS 法测定海水中溴碘方法的研究 - 质谱学报.PDF

108 质谱学报 第28 卷增刊 ICP-MS 法测定海水中溴碘方法的研究 1,2 1,2 1,2 1,2 杨 涛 ，高剑峰 ，赖鸣远 ，杨競红 (1. 南京大学地球科学系内生金属矿床成矿机制研究国家重点实验室，南京 210093 ； 2. 南京大学海洋地球化学研究中心，南京 210093) Determination of Bromine and Iodine in Sea Water by Inductively Coupled Plasma Mass Spectrometry YANG Tao1,2, GAO Jian-feng1,2, LAI Ming-yuan1,2, YANG Jing-hong1,2 (1. State Key Laboratory for Mineral Deposits Research, Department of Earth Sciences, Nanjing University, Nanjing, 210093,China 2. Center for Marine Geochemistry Research, Nanjing University, Nanjing, 210093,China) Abstract: An analytical method for measuring bromine and iodine in sea water and sediment pore waters is reported in this study by using inductively coupled plasma mass spectrometry (ICP-MS). The instrument used here was a High Resolution ICP-MS (Finnigan Element II). We assessed the signal stability of different anion species in different solution mediums, and we found that the most suitable medium for determination of these elements in sea water and sediment pore waters was 0.1% NH ·H O. In addition, we prepared a laboratory sea water standard and 3 2 obtained its bromine and iodine concentrations. The method gives an analytical precision of 1% and 2% for bromine and iodine measurement, respectively. Key words: bromine; iodine; solution mediums; signal stability; ICP-MS 中图分类号：O657.63 文献标识码：A 文章编号：1004-2997 （2007 ）增刊-108-02 溴碘元素与生物有密切关系是海洋生物必需的营养元素，被列入海水化学要素分析。溴离子分