Rapid determination of zinc in foods by flow injection analysis with flame AAS using gradient calibration method

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dc.contributor.authorAnzano, Jesús M.
dc.contributor.authorHeinemann, Riana J. B. [UNESP]
dc.contributor.authorMir, José Ma.
dc.contributor.institutionUniversity of Zaragoza
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:21:09Z
dc.date.available2014-05-27T11:21:09Z
dc.date.issued2004-09-01
dc.description.abstractA calibration method was developed using flow injection analysis (FI) with a Gradient Calibration Method (GCM). The method allows the rapid determination of zinc In foods (approximately 30 min) after treatment with concentrated sulphuric acid and 30% hydrogen peroxide, and analysis with flame atomic absorption spectrometry (FAAS). The method provides analytical results with a relative standard deviation of about 2% and requires less time than by conventional FI calibration. The electronic selection of different segments along the gradient and monitoring of the technique covers wide concentration ranges while maintaining the inherent high precision of flow injection analysis. Concentrations, flow rates, and flow times of the reagents were optimized in order to obtain best accuracy and precision. Flow rates of 10 mL/min were selected for zinc. In addition, the system enables electronic dilution and calibration where a multipoint curve can be constructed using a single sample injection.en
dc.description.affiliationDepartment of Analytical Chemistry Science Faculty University of Zaragoza, Pedro Cerbuna #12, E-50009, Zaragoza
dc.description.affiliationDept. of Food Eng. and Technology Unesp/IBILCE, S. Jose do Rio Preto, S. Paulo
dc.description.affiliationUnespDept. of Food Eng. and Technology Unesp/IBILCE, S. Jose do Rio Preto, S. Paulo
dc.format.extent221-225
dc.identifier.citationAtomic Spectroscopy, v. 25, n. 5, p. 221-225, 2004.
dc.identifier.issn0195-5373
dc.identifier.scopus2-s2.0-7544222967
dc.identifier.urihttp://hdl.handle.net/11449/67873
dc.language.isoeng
dc.relation.ispartofAtomic Spectroscopy
dc.relation.ispartofjcr1.123
dc.relation.ispartofsjr0,327
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjecthydrogen peroxide
dc.subjectsulfuric acid
dc.subjectzinc
dc.subjectaccuracy
dc.subjectanalytic method
dc.subjectatomic absorption spectrometry
dc.subjectcalibration
dc.subjectflame atomic absorption spectrometry
dc.subjectflow injection analysis
dc.subjectflow rate
dc.subjectfood analysis
dc.subjectintermethod comparison
dc.titleRapid determination of zinc in foods by flow injection analysis with flame AAS using gradient calibration methoden
dc.typeArtigo
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências Letras e Ciências Exatas, São José do Rio Pretopt

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Artigos - Engenharia e Tecnologia de Alimentos - IBILCE