Determination of inorganic arsenic in Argentinean rice by selective HGAAS: Analytical performance for paddy,brown and polished rice |
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| Affiliation: | 1. Program of Research and Analysis of Chemical Residues and Contaminants (PRINARC), Faculty of Chemical Engineering, National University of Littoral, Santa Fe, Argentina;2. National Institute of Agricultural Technology (INTA), EEA Concepción del Uruguay, Entre Ríos, Argentina;1. Department of Chemistry, College of Natural and Computational Sciences, Haramaya University, Oromia, Ethiopia;2. School of Water Resources and Environment, Research Center of Environmental Science and Engineering, China University of Geosciences (Beijing), 100083 Beijing, China;3. School of Plant Sciences, College of Agriculture and Environmental Sciences, Haramaya University, Oromia, Ethiopia;1. Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, PR China;2. MOE Key Laboratory of Resources and Environmental Systems Optimization, Beijing, 102206, PR China;1. School of Pharmaceutical Sciences, Hoshi University, 2-4-41, Ebara, Shinagawa-ku, Tokyo 142-8501 Japan;2. Division of Foods, National Institute of Health Sciences, Tonomachi 3-25-26, Kawasaki-ku, Kawasaki, Kanagawa, 210-9501, Japan;1. Mokpo National University, Department of Chemistry, 61 dorimri, Chungkyemyon, Muangun, Chonnam 58554, Republic of Korea;2. Department of Environmental Health Research, National Institute of Environmental Research, Incheon, Republic of Korea;1. College of Food Science, Southwest University, Chongqing 400715, China;2. Chongqing University of Education, Chongqing Collaborative Innovation Center for Functional Food, Chongqing Engineering Research Center of Functional Food, Chongqing Engineering Laboratory for Research and Development of Functional Food, Chongqing 400067, China;3. Chongqing Furen High School, Chongqing 400067, China;4. Chongqing Customs Technology Center, Chongqing 400020, China |
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| Abstract: | Inorganic As (iAs) species require strict monitoring in foodstuff due to their toxicity. Rice is of particular concern, with recent legislations establishing limits for these species. In this work we develop a method based on selective hydride generation atomic absorption spectrometry (HGAAS) for the determination of iAs in different types of rice (polish, parboiled, brown and paddy rice). The multivariate design of experiments used for optimization showed interactions between different factors involved in hydride generation. Matrix effects were systematically studied, where the flow rate of the carrier gas proved to be a critical parameter for the minimization of matrix interferences. Nevertheless, matrix-matching was found to be necessary for accurate quantification of paddy rice samples. Comparison of the iAs concentrations obtained by HGAAS and HPLC-ICP-MS showed non-significant differences between the methods. Analysis of 86 rice samples from the province of Entre Ríos showed relatively low concentrations of iAs (<282 μg kg−1 for paddy rice and <120 μg kg−1 for polished rice), regardless of total As concentrations (which ranged from 63 μg kg−1 to 932 μg kg−1), suggesting that the rice analyzed tends to accumulate As in its organic forms. |
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| Keywords: | Inorganic arsenic Speciation Rice Selective hydride generation Atomic absorption spectrometry Matrix effect Argentina Food composition Food analysis |
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