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Speciation analysis of iodate and iodide in high salt brine by high performance liquid chromatography and inductively coupled plasma mass spectrometry

Abstract

A sensitive and interference-free iodine speciation analysis in high salt matrix is crucial either in the application of iodine ion-exchange adsorption removal or in brine chemical engineering industrial of caustic soda. In this work, the high performance liquid chromatography (HPLC) hyphenated with inductively coupled plasma mass spectrometry (ICP-MS) was investigated. Peak splitting under high salt matrix was found and solved by the new efficient mobile phase ammonium carbonate. A high-efficiency separation anion-exchange column (Dionex IonPac AS-14) for iodate and iodide with 100 mM (NH4)2CO3 solution at pH = 10 as mobile phase was proved, and the total running time of individual sample was within 8 min. Linear standard calibration plots were obtained in a concentration range of 1.0-100 µg L-1 for iodate and iodide, and the detection limits were 0.05 µg L-1 for the former and 0.20 µg L-1 for the latter. A precise analytical procedure of HPLC-ICP-MS was developed to determine rapidly and exactly the iodine species of iodide and iodate at trace level in high salt brine samples.

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Publication details

The article was received on 04 Apr 2019, accepted on 15 May 2019 and first published on 15 May 2019


Article type: Technical Note
DOI: 10.1039/C9JA00121B
J. Anal. At. Spectrom., 2019, Accepted Manuscript

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    Speciation analysis of iodate and iodide in high salt brine by high performance liquid chromatography and inductively coupled plasma mass spectrometry

    W. Cui, H. Hou, J. Chen, X. Yu, Y. Guo, Z. Tao, T. Deng, Y. Chen and N. Belzile, J. Anal. At. Spectrom., 2019, Accepted Manuscript , DOI: 10.1039/C9JA00121B

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