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Determination of Iodate in Iodized Salt by Reversed-Phase High-Performance Liquid Chromatography with UV Detection |
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| Authors: | X R Xu H B Li J-D Gu K J Paeng |
| Institution: | 1. Laboratory of Environmental Toxicology, Department of Ecology & Biodiversity, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, People’s Republic of China 3. Department of Chemistry, Yonsei University, Wonju, 220–710, South Korea 2. The Swire Institute of Marine Science, The University of Hong Kong, Shek O, Cape d’Aguilar, Hong Kong SAR, People’s Republic of China |
| Abstract: | A method for the determination of iodate was developed by reversed-phase high-performance liquid chromatography with UV detection. Iodate was converted to iodine, which was separated from the matrix using a reversed-phase Ultrasphere C18 column (250 × 4.6 mm, 5 μm) with methanol-1 mmol L?1 H3PO4 (20:80, v/v) as mobile phase at 1.00 mL min?1 and UV detection at 224 nm. The calibration graph was linear from 0.05 μg mL?1 to 5.00μg mL?1 for iodine with a correlation coefficient of 0.9994 (n=7). The detection limit was 0.01 μg mL?1. The method was successfully applied to the determination of iodate in iodized salt. The recovery was from 96% to 101% and the relative standard deviation was in the range of 1.5% to 2.9%. |
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