Speciation of organic and inorganic selenium in selenium-enriched rice by graphite furnace atomic absorption spectrometry after cloud point extraction |
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| Authors: | Mei Sun Guijian Liu Qianghua Wu |
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| Affiliation: | 1. CAS Key Laboratory of Crust-Mantle Materials and Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China;2. Hefei National Laboratory for Physical Sciences on Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China;3. Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China |
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| Abstract: | A new method was developed for the determination of organic and inorganic selenium in selenium-enriched rice by graphite furnace atomic absorption spectrometry detection after cloud point extraction. Effective separation of organic and inorganic selenium in selenium-enriched rice was achieved by sequentially extracting with water and cyclohexane. Under the optimised conditions, the limit of detection (LOD) was 0.08 μg L−1, the relative standard deviation (RSD) was 2.1% (c = 10.0 μg L−1, n = 11), and the enrichment factor for selenium was 82. Recoveries of inorganic selenium in the selenium-enriched rice samples were between 90.3% and 106.0%. The proposed method was successfully applied for the determination of organic and inorganic selenium as well as total selenium in selenium-enriched rice. |
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| Keywords: | Speciation Selenium-enriched rice Graphite furnace atomic absorption spectrometry Cloud point extraction |
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