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Issue 7, 2019
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The speciation analysis of iodate and iodide in high salt brine by high performance liquid chromatography and inductively coupled plasma mass spectrometry

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Abstract

A sensitive and interference-free iodine speciation analysis in high salt matrix is crucial either for the application of iodine ion-exchange adsorption removal or in chlor-alkali industrial of caustic soda. In this study, we investigated the iodine speciation using the high performance liquid chromatography (HPLC) coupled with inductively coupled plasma mass spectrometry (ICP-MS). Peak splitting under high salt matrix was found and solved using the new efficient mobile phase of 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 confirmed, 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 both 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 rapidly and exactly determine the iodine species of iodide and iodate at trace levels in high salt brine samples.

Graphical abstract: The speciation analysis of iodate and iodide in high salt brine by high performance liquid chromatography and inductively coupled plasma mass spectrometry

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Article information


Submitted
04 Apr 2019
Accepted
15 May 2019
First published
15 May 2019

J. Anal. At. Spectrom., 2019,34, 1374-1379
Article type
Technical Note

The 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, 34, 1374
DOI: 10.1039/C9JA00121B

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