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Registro Completo |
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Biblioteca(s): |
Embrapa Clima Temperado. |
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Data corrente: |
22/09/2003 |
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Data da última atualização: |
28/12/2018 |
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Autoria: |
RODRIGUES, R. C.; COELHO, R. W.; COSTA, N. L. da; BENTO, C. L. R. |
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Título: |
Silagem pré-secada de azevém e a aveia preta como alternativa de forragem conservada. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
Pelotas: Embrapa-CPACT, 1998. |
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Páginas: |
2 p. |
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Série: |
(EMBRAPA-CPACT. Pesquisa em Andamento, 17) |
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Idioma: |
Português |
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Palavras-Chave: |
Alimentação animal; Planta forragira. |
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Thesagro: |
Aveia; Azevém; Secagem; Silagem. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00642nam a2200229 a 4500
001 1744436
005 2018-12-28
008 1998 bl uuuu u0uu1 u #d
100 1 $aRODRIGUES, R. C.
245 $aSilagem pré-secada de azevém e a aveia preta como alternativa de forragem conservada.
260 $aPelotas: Embrapa-CPACT$c1998
300 $a2 p.
490 $a(EMBRAPA-CPACT. Pesquisa em Andamento, 17)
650 $aAveia
650 $aAzevém
650 $aSecagem
650 $aSilagem
653 $aAlimentação animal
653 $aPlanta forragira
700 1 $aCOELHO, R. W.
700 1 $aCOSTA, N. L. da
700 1 $aBENTO, C. L. R.
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Registro original: |
Embrapa Clima Temperado (CPACT) |
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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. |
Registro Completo
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
18/08/2005 |
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Data da última atualização: |
08/05/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
NASCENTES, C. C.; KAMOGAWA, M. Y.; FERNANDES, K. F.; ARRUDA, M. A. Z.; NOGUEIRA, A. R. de A.; NÓBREGA, J. A. |
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Afiliação: |
CLESIA C. NASCENTE, Universidade Federal de São Carlos; MARCOS Y. KAMOGAWA, Universidade Federal de São Carlos; KELLY G. FERNANDES, Universidade Federal de São Carlos; MARCO A. Z. ARRUDA, Universidade Estadual de Campinas; ANA RITA DE ARAUJO NOGUEIRA, CPPSE; JOAQUIM A. NOBREGA, Universidade Federal de São Carlos. |
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Título: |
Direct determination of Cu, Mn, Pb, Zn in beer by thermospray flame furnace atomic absorption spectrometry. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
Spectrochimica Acta Part B, v. 60, p. 749-753, 2005. |
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DOI: |
https://doi.org/10.1016/j.sab.2005.02.012 |
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Idioma: |
Inglês |
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Conteúdo: |
In this work, thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS) was employed for Cu, Mn, Pb, and Zn determination in beer without any sample digestion. The system was optimized and calibration was based on the analyte addition technique. A sample volume of 300 Al was introduced into the hot Ni tube at a flow-rate of 0.4 ml min1 using 0.14 ml -1 nitric acid solution or air as carrier. Different Brazilian beers were directly analyzed after ultrasonic degasification. Results were compared with those obtained by graphite furnace atomic absorption spectrometry (GFAAS). The detection limits obtained for Cu, Mn, Pb, and Zn in aqueous solution were 2.2, 18, 1.6, and 0.9 ug l-1, respectively. The relative standard deviations varied from 2.7% to 7.3% (n=8) for solutions containing the analytes in the 25-50 ug 1-1 range. The concentration ranges obtained for analytes in beer samples were: Cu: 38.0-155 ug l-1; Mn: 110-348 ug l-1, Pb: 13.0-32.9 ug l-1, and Zn: 52.7-226 ug l-1. Results obtained by TS-FF-AAS and GFAAS were in agreement at a 95% confidence level. The proposed method is fast and simple, since sample digestion is not required and sensitivity can be improved without using expensive devices. The TS-FF-AAS presented suitable sensitivity for determination of Cu, Mn, Pb, and Zn in the quality control of a brewery. |
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Palavras-Chave: |
Determination; FAAS; Flame furnace; Spectrometry; Thermospray; Trace metals. |
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Thesaurus NAL: |
Beers. |
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Categoria do assunto: |
W Química e Física |
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Marc: |
LEADER 02177naa a2200277 a 4500
001 1047179
005 2023-05-08
008 2005 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.sab.2005.02.012$2DOI
100 1 $aNASCENTES, C. C.
245 $aDirect determination of Cu, Mn, Pb, Zn in beer by thermospray flame furnace atomic absorption spectrometry.$h[electronic resource]
260 $c2005
520 $aIn this work, thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS) was employed for Cu, Mn, Pb, and Zn determination in beer without any sample digestion. The system was optimized and calibration was based on the analyte addition technique. A sample volume of 300 Al was introduced into the hot Ni tube at a flow-rate of 0.4 ml min1 using 0.14 ml -1 nitric acid solution or air as carrier. Different Brazilian beers were directly analyzed after ultrasonic degasification. Results were compared with those obtained by graphite furnace atomic absorption spectrometry (GFAAS). The detection limits obtained for Cu, Mn, Pb, and Zn in aqueous solution were 2.2, 18, 1.6, and 0.9 ug l-1, respectively. The relative standard deviations varied from 2.7% to 7.3% (n=8) for solutions containing the analytes in the 25-50 ug 1-1 range. The concentration ranges obtained for analytes in beer samples were: Cu: 38.0-155 ug l-1; Mn: 110-348 ug l-1, Pb: 13.0-32.9 ug l-1, and Zn: 52.7-226 ug l-1. Results obtained by TS-FF-AAS and GFAAS were in agreement at a 95% confidence level. The proposed method is fast and simple, since sample digestion is not required and sensitivity can be improved without using expensive devices. The TS-FF-AAS presented suitable sensitivity for determination of Cu, Mn, Pb, and Zn in the quality control of a brewery.
650 $aBeers
653 $aDetermination
653 $aFAAS
653 $aFlame furnace
653 $aSpectrometry
653 $aThermospray
653 $aTrace metals
700 1 $aKAMOGAWA, M. Y.
700 1 $aFERNANDES, K. F.
700 1 $aARRUDA, M. A. Z.
700 1 $aNOGUEIRA, A. R. de A.
700 1 $aNÓBREGA, J. A.
773 $tSpectrochimica Acta Part B$gv. 60, p. 749-753, 2005.
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