Speciation of iodate and iodide in seawater by non-suppressed ion chromatography with inductively coupled plasma mass spectrometry
Speciation of iodate and iodide in seawater by non-suppressed ion chromatography with inductively coupled plasma mass spectrometry
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DOI：
10.1016/j.talanta.2007.02.014
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发表时间：
2007-07-31
期刊：
影响因子：
6.1
通讯作者：
Naidu, Ravendra
中科院分区：
文献类型：
--
作者：
Chen, ZuLiang;Megharaj, Mallavarapu;Naidu, Ravendra
建立了一种非抑制离子色谱-电感耦合等离子体质谱（ICP-MS）同时测定海水中微量碘酸盐和碘化物的方法。阴离子交换柱（G3154A/101，由Agilent提供）使用含有20 mM NH4NO3， pH 5.6的洗脱液分离碘酸盐和碘化物，这减少了取样器和撇清锥上盐的积累。考察了淋洗液中竞争离子（NO3-）对保留时间和检测灵敏度的影响，给出了合理的分辨率和检出限。在5.0 ~ 500 μ g/L浓度范围内呈线性关系，检出限碘酸盐为1.5 μ g/L，碘化物为2.0 μ g/L。该方法除稀释外，可用于海水中碘酸盐和碘化物的测定，无需样品预处理。(C) 2007 Elsevier B.V.版权所有
A non-suppressed ion chromatography (IC) with inductively coupled plasma mass spectrometry (ICP-MS) has been developed for simultaneous determination of trace iodate and iodide in seawater. An anion-exchange column (G3154A/101, provided by Agilent) was used for the separation of iodate and iodide with an eluent containing 20 mM NH4NO3 at pH 5.6, which reduced the build-up of salts on the sampler and skimmer cones. The influences of competing ion (NO3-) in the eluent on the retention time and detection sensitivity were investigated to give reasonable resolution and detection limits. Linear plots were obtained in a concentration range of 5.0-500 mu g/L and the detection limit was 1.5 mu g/L for iodate and 2.0 mu g/L for iodide. The proposed method was used to determinate iodate and iodide in seawaters without sample pre-treatment with exception of dilution. (C) 2007 Elsevier B.V. All rights reserved.