Mechanistic study of the aluminum interference in the determination of arsenic by electrothermal atomic absorption spectrometry |
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| Affiliation: | 1. University of Silesia, Institute of Chemistry, Szkolna 9, 40-006 Katowice, Poland;2. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław, Poland;3. Institute of Environmental Assessment and Water Research, Dep. of Geosciences, IDAEA-CSIC, Jordi Girona St., 18-26, 08034 Barcelona, Spain;4. Department of Chemistry, University of Girona, Faculty of Sciences, C/M.Aurèlia Campmany, 69, Girona, Spain;1. Department of Cardiology, Royal United Hospital, Combe Park, Bath, BA1 3NG, UK;2. Department for Health, University of Bath, Claverton Down, Bath, BA2 7AY, UK;3. Department of Laboratory Medicine, Salisbury District Hospital, Odstock Road, Salisbury, SP2 8BJ, UK;4. Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford OX3 9DU, UK;5. Department of Radiology, Royal United Hospital, Combe Park, Bath, BA1 3NG, UK;1. Department of Natural Resources and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, South Korea;2. Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, South Korea;3. Department of Energy and Environment, Sejong University, Seoul 143-747, South Korea;4. Mine Reclamation Corporation, Coal Center, 2 Segye-ro, Wonju, Gangwon-do 16464, South Korea;1. Department of Botany, University of Sargodha, Pakistan;2. Govt. College University, Faisalabad, Pakistan;3. Pakistan Science Foundation, Islamabad, Pakistan;4. Department of Zoology, University of Sargodha, Pakistan;1. Department of Food Science and Technology, Federal University of Santa Catarina, Florianopolis, SC, Brazil;2. Department of Nutrition, Federal University of Parana, Curitiba, PR, Brazil;3. Center of Natural and Human Sciences, ABC Federal University, Santo André, SP, Brazil;4. Department of Chemistry, Federal University of Santa Catarina, Florianopolis, SC, Brazil;5. INCT-EAB (National Institute of Science and Technology – Energy, Environment and Biodiversity – CNPq), Brazil;6. Department of Food Technology, Federal University of Paraiba, Joao Pessoa, PB, Brazil;1. Department of Physics and Chemistry, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Av. do Café, s/n, CEP 14040-903 Ribeirão Preto, SP, Brazil;2. Department of Biosystem Engineering, School of Animal Science and Food Engineering, University of São Paulo, Av. Duque de Caxias–Norte, 225, CEP 13635-900 Pirassununga, SP, Brazil;3. Department of Food Engineering, School of Animal Science and Food Engineering, University of São Paulo, Av. Duque de Caxias—Norte, 225, CEP 13635-900 Pirassununga, SP, Brazil |
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| Abstract: | The interference effect derived from the presence of aluminum in the wall and platform atomization of arsenic using two sampling modes (aerosol vs. liquid drop) was revisited. The mechanistic action of the Al interference seems to be the result of the formation of some gas phase Al oxide, which would absorb at the arsenic analytical wavelength. A vaporization/condensation process for aluminum oxide seems to exist into the graphite tube with temperature. The effect of protons (as nitric acid) and activated carbon on the behavior of the Al interference was tested. A beneficial effect of overcoming the Al interference was derived from the presence of activated carbon. The mechanistic action of both, protons and activated carbon, was also proposed. |
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