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  • Title: Speciation of iodate and iodide in seawater by non-suppressed ion chromatography with inductively coupled plasma mass spectrometry.
    Author: Chen Z, Megharaj M, Naidu R.
    Journal: Talanta; 2007 Jul 31; 72(5):1842-6. PubMed ID: 19071841.
    Abstract:
    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 20mM NH(4)NO(3) at pH 5.6, which reduced the build-up of salts on the sampler and skimmer cones. The influences of competing ion (NO(3)(-)) 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 microg/L and the detection limit was 1.5 microg/L for iodate and 2.0 microg/L for iodide. The proposed method was used to determinate iodate and iodide in seawaters without sample pre-treatment with exception of dilution.
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