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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
01/01/2002 |
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Data da última atualização: |
08/03/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA, E. G. P. da; HATJE, V.; SANTOS, W. N. L. dos; COSTA, L. M.; NOGUEIRA, A. R. de A.; FERREIRA, S. L. C. |
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Afiliação: |
ERIK G. P. DA SILVA, UFB; VANESSA HATJE, UFB; WALTER N. L. DOS SANTOS, Universidade Estadual de Santa Cruz Ilhéus; LETÍCIA M. COSTA, UFMG- Instituto de Química; ANA RITA DE ARAUJO NOGUEIRA, CPPSE; SERGIO L. C. FERREIRA, UFB. |
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Título: |
Fast method for the determination of copper, maganese and iron in seafood samples. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Journal of Food Composition and Analysis, v. 21, n. 3, p. 259-263, may2008. |
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DOI: |
10.1016/j.jfca.2007.10.005 |
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Idioma: |
Inglês |
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Conteúdo: |
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 80 mg 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 mol L-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 µg g-1, respectively. The precision, expressed as relative standard deviation (RSD), are 3.0%, 2.9% and 3.8% (n=10), for concentrations of copper, manganese and iron of 17, 22 and 719 µg g-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 µg g-1, 17.9 and 29.7 µg g-1 and 364 and 1388 µg g-1, respectively, for copper, manganese and iron. These values agree well with other data reported in the literature. The results showed no significant differences (P>0.005) using the proposed method with those obtained after complete digestion and determination by inductively coupled plasma-optical emission spectroscopy (ICP-OES). MenosA 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 80 mg 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 mol L-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 µg g-1, respectively. The precision, expressed as relative standard deviation (RSD), are 3.0%, 2.9% and 3.8% (n=10), for concentrations of copper, manganese and iron of 17, 22 and 719 µg g-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 µg g-1, 17.9 and 29.7 µg g-1 and 364 and 1388 µg g-1, respect... Mostrar Tudo |
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Palavras-Chave: |
Cu; Fast sequential; Fe; Mn; Seafood; Slurry sampling. |
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Thesaurus Nal: |
copper; iron; manganese. |
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Categoria do assunto: |
W Química e Física |
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Marc: |
LEADER 02665naa a2200301 a 4500
001 1048497
005 2023-03-08
008 2008 bl uuuu u00u1 u #d
024 7 $a10.1016/j.jfca.2007.10.005$2DOI
100 1 $aSILVA, E. G. P. da
245 $aFast method for the determination of copper, maganese and iron in seafood samples.$h[electronic resource]
260 $c2008
520 $aA 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 80 mg 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 mol L-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 µg g-1, respectively. The precision, expressed as relative standard deviation (RSD), are 3.0%, 2.9% and 3.8% (n=10), for concentrations of copper, manganese and iron of 17, 22 and 719 µg g-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 µg g-1, 17.9 and 29.7 µg g-1 and 364 and 1388 µg g-1, respectively, for copper, manganese and iron. These values agree well with other data reported in the literature. The results showed no significant differences (P>0.005) using the proposed method with those obtained after complete digestion and determination by inductively coupled plasma-optical emission spectroscopy (ICP-OES).
650 $acopper
650 $airon
650 $amanganese
653 $aCu
653 $aFast sequential
653 $aFe
653 $aMn
653 $aSeafood
653 $aSlurry sampling
700 1 $aHATJE, V.
700 1 $aSANTOS, W. N. L. dos
700 1 $aCOSTA, L. M.
700 1 $aNOGUEIRA, A. R. de A.
700 1 $aFERREIRA, S. L. C.
773 $tJournal of Food Composition and Analysis$gv. 21, n. 3, p. 259-263, may2008.
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Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
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Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
15/03/2006 |
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Data da última atualização: |
15/03/2006 |
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Autoria: |
MARTIN-NETO, L.; BAYER, C.; MIELNICZUK, J.; SAAB, S. |
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Título: |
Ressonância paramagnética eletrônica em agregados organo-minerais: interferência da fração mineral na quantificação da concentração de readicais livres semiquinona da matéria orgânica. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 26., 1999, Brasília. Ciência do Solo qualidade de vida. Brasília: Embrapa Cerrados; Sociedade Brasileira de Ciência do Solo, 1999. Não paginado, ref. TO94-1-Painel: B-17. Resumo. 1 CD-ROM. |
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Idioma: |
Português |
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Conteúdo: |
A concentração de radicais livres semiquinona (CRLS), determinada por ressonância paramagnética eletrônica (RPE) é considerada um índice do grau de humificação, sendo uma importante determinação em estudos qualitativos da matéria orgânica do solo. |
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Palavras-Chave: |
CRLS; Grau de humificação; Radicais livres; RPE. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01114naa a2200205 a 4500
001 1029661
005 2006-03-15
008 1999 bl --- 0-- u #d
100 1 $aMARTIN-NETO, L.
245 $aRessonância paramagnética eletrônica em agregados organo-minerais$binterferência da fração mineral na quantificação da concentração de readicais livres semiquinona da matéria orgânica.
260 $c1999
520 $aA concentração de radicais livres semiquinona (CRLS), determinada por ressonância paramagnética eletrônica (RPE) é considerada um índice do grau de humificação, sendo uma importante determinação em estudos qualitativos da matéria orgânica do solo.
653 $aCRLS
653 $aGrau de humificação
653 $aRadicais livres
653 $aRPE
700 1 $aBAYER, C.
700 1 $aMIELNICZUK, J.
700 1 $aSAAB, S.
773 $tIn: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 26., 1999, Brasília. Ciência do Solo qualidade de vida. Brasília: Embrapa Cerrados; Sociedade Brasileira de Ciência do Solo, 1999. Não paginado, ref. TO94-1-Painel: B-17. Resumo. 1 CD-ROM.
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