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Determination of Fluoride in Water by Reversed-Phase High-Performance Liquid Chromatography using F−-La3+-Alizarin Complexone Ternary Complex |
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| Authors: | X. R. Xu H. B. Li J.-D. Gu K. J. Paeng |
| Affiliation: | 1. Laboratory of Environmental Toxicology, The University of Hong Kong, Department of Ecology & Biodiversity, Pokfulam Road, Hong Kong SAR, People’s Republic of China 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 3. Environmental and Molecular Microbiology, Key Laboratory of Tropical Marine Environment Dynamics (LED), South China Sea Institute of Oceanography, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou, 510301, P.R. China 4. Department of Chemistry, Yonsei University, Wonju, 220-710, South Korea |
| Abstract: | A method for the determination of fluoride by reversed-phase, high-performance liquid chromatography (RP-HPLC) is described. Fluoride, La3+ and alizarin complexone form F-La3+-alizarin complexone ternary complex, which is separated from the matrix on a RP, Ultrasphere C18 column (250 × 4.6 mm, 5 μm) using methanol-water (19:81, v/v) mobile phase at 1.00 mL min?1; detection at 568 nm. The calibration graph was linear from 1.0–150 ng mL?1 for fluoride with a correlation coefficient: 0.9993 (n=6). The detection limit was 0.2 ng mL?1. The method was successfully applied to the determination of fluoride in river and tap water. Recovery was: 94–102%, RSD in the range: 1.9 –3.6%. |
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