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Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/6156
Tipo: Artigo de Periódico
Título: Fast method for the determination of copper, manganese and iron in seafood samples
Título(s) alternativo(s): Journal of Food Composition and Analysis
Autor(es): Silva, Erik Galvão Paranhos da
Hatje, Vanessa
Santos, Walter Nei Lopes dos
Costa, Letícia M.
Nogueira, Ana Rita de Araujo
Ferreira, Sergio Luis Costa
Autor(es): Silva, Erik Galvão Paranhos da
Hatje, Vanessa
Santos, Walter Nei Lopes dos
Costa, Letícia M.
Nogueira, Ana Rita de Araujo
Ferreira, Sergio Luis Costa
Abstract: A slurry sampling flame atomic absorption spectrometric method is proposed for the determination of copper, manganese and iron in oysters (Crassostrea rhizophora), clams (Anomalocardia brasiliana) and mussels (Mytella guiyanensis; Perna perna). Optimization was carried out using univariate methodology involving the following variables: nature and concentration of the acid solution for slurry preparation, sonication time and sample mass. The optimized conditions were 80mg of sample ground in a cryogenic mil, dilution using 1.0 mol L 1 nitric /hydrochloric acid solution, sonication time of 30 min and a slurry volume of 10 mL. The calibration curves had been prepared using standards of copper, manganese and iron also in 1.0 molL 1 nitric/hydrochloric acid solution. This method allowed the determination of copper, manganese and iron by FAAS, with detection limits of 0.17, 0.09 and 0.46 mg g 1, respectively. The precision, expressed as relative standard deviation (RSD), are 3.0%, 2.9% and 3.8% (n ¼ 10), for concentrations of copper, manganese and iron of 17, 22 and 719 mgg 1, respectively. The accuracy of the method was confirmed by analysis of the certified oyster tissue (NIST 1566b). The proposed method was applied for the determination of copper, manganese and iron in samples of oyster, clams and mussels, collected in Ubatuba and Todos os Santos Bay, Brazil. The obtained concentrations varied between 17.1 and 143.9 mg g 1, 17.9 and 29.7 mg g 1 and 364 and 1388 mgg 1, respectively, for copper, manganese and iron. These values agree well with other data reported in the literature. The results showed no significant differences (P40.005) using the proposed method with those obtained after complete digestion and determination by inductively coupled plasma-optical emission spectroscopy (ICP-OES).
Palavras-chave: Determination of copper manganese and iron
Cu
Mn
Fe
Slurry sampling
Fast sequential
Seafood samples
Oysters
Crassostrea rhizophora
Clams
Anomalocardia brasiliana
Mussels
Mytella guiyanensis
Perna perna
URI: http://www.repositorio.ufba.br/ri/handle/ri/6156
Data do documento: 2008
Aparece nas coleções:Artigo Publicado em Periódico (Química)

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