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dc.typeArtigo de periódicopt_BR
dc.titleDevelopment And Feasibility Of Emulsion Breaking Method For The Extraction Of Cadmium From Omega-3 Dietary Supplements And Determination By Flow Injection Ts-ff-aaspt_BR
unicamp.authorTarley, C.R.T., Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina (UEL), Rodovia Celso Garcia Cid, PR 445, Km 380, Londrina, Brazil, Instituto Nacional de Ciência e Tecnologia (INCT) de Bioanalítica, Universidade Estadual de Campinas (UNICAMP), Instituto de Química, Departamento de Química Analítica, Cidade Universitária Zeferino Vaz s/n, Campinas, Brazilpt_BR, M.Z., Faculdade de Ciências Exatas e Tecnologia (FACET), Universidade Federal da Grande Dourados (UFGD), Dourados MS, Brazil, Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina (UEL), Rodovia Celso Garcia Cid, PR 445, Km 380, Londrina, Brazilpt
dc.description.abstractIn the present study a new method for the determination of Cd2+ in omega-3 dietary supplement employing extraction induced by emulsion breaking (EIEB) and thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS) was described. The method was based on the formation of a water-in-oil emulsion by the addition of extractor solution constituted by 3.54% (m/v) Triton X-114 and 1.16 mol L-1 HNO3 in the oil sample and further breaking of this emulsion by heating. Two well-defined phases were formed and the acid aqueous one containing the extracted cadmium ions was analyzed by TS-FF-AAS using a flow injection system. Different parameters that exert influence on the extraction efficiency of Cd2+ were optimized by means of chemometric tools. The limits of detection and quantification were found to be 2.5 and 8.3 ng g-1, respectively using a calibration curve made in aqueous medium. The accuracy of the proposed method was assured by good agreement with the results achieved by microwave-assisted acid digestion procedure without statistical differences (confidence interval of 95%) and by spiking the samples with known concentrations of 50 ng g-1 Cd2+. The content of Cd2+ in the samples was varied from 37.3 up to 54.5 ng g-1. © 2016 Elsevier B.V.en
dc.relation.ispartofMicrochemical Journalpt_BR
dc.publisherElsevier Inc.pt_BR
dc.identifier.citationMicrochemical Journal. Elsevier Inc., v. 127, p. 145 - 151, 2016.pt_BR
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