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Speciation of iodate and iodide in seawater by non-suppressed ion chromatography with inductively coupled plasma mass spectrometry |
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| Authors: | ZuLiang Chen Mallavarapu Megharaj Ravendra Naidu |
| Affiliation: | aSchool of Chemistry, Fujian Normal University, Fuzhou 350007, China bCentre for Environmental Risk Assessment and Remediation, University of South Australia, Mawson Lakes, SA 5095, Australia cCooperative Research Centre for Contamination Assessment and Remediation of Environments, Mawson Lakes Boulevard, Mawson Lakes, South Australia 5095, Australia |
| 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 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 μg/L and the detection limit was 1.5 μg/L for iodate and 2.0 μg/L for iodide. The proposed method was used to determinate iodate and iodide in seawaters without sample pre-treatment with exception of dilution. |
| Keywords: | IC–ICP-MS Iodate and iodide Seawater |
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