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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
03/09/1998 |
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Data da última atualização: |
02/09/2021 |
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Autoria: |
NOGUEIRA, A. R. de A.; SOUZA, G. B. de; BATISTA, L. A. R.; ARRUDA, M. A. Z.; MIYAZAWA, M. |
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Afiliação: |
ANA RITA DE ARAUJO NOGUEIRA, CPPSE; GILBERTO BATISTA DE SOUZA, CPPSE; LUIZ ALBERTO ROCHA BATISTA, CPPSE; UNICAMP; Instituto Agronômico do Paraná. |
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Título: |
Catalytic determination of cobalt by flow injection spectrophotometry: application in animal faeces analysis using hydrochloric acid as extracting solution. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
Animal Feed Science and Technology. v.74, n.1, 1998. |
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Páginas: |
p.79-84 |
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Idioma: |
Inglês |
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Conteúdo: |
A flow injection system for cobalt determination in faeces of bovines and equines receiving CoEDTA as a tracer in animal nutrition studies is proposed, using 1.0 mol HCl lÿ1 as extracting medium, and detection by flow injection spectrophotometric procedure based on the catalytic effect of Co(II) on the oxidation of Tiron by hydrogen peroxide. Linearity was observed up to 8.0 mg Co lÿ1, and the detection limit was 0.2 mg Co lÿ1 (3 s blank). The system requires 0.12 mg Tiron per determination and handles 65 samples hÿ1. No baseline drift was observed during extended operation periods (8 h) and precise results (r.s.d.<1%) were detected. Accuracy was confirmed by running several faeces samples already analysed by flame atomic absorption spectrometry. Results related to the HCl extraction procedure were in close agreement with those obtained using the nitric-perchloric digestion (y0.978x0.101, R2 0.9848), suggesting that HCl extraction and flow injection determination can be used routinely for rapid analysis of cobalt in faeces. |
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Palavras-Chave: |
Flow injection; HCI extraction; Injeção em fluxo; Spectrophotometry. |
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Thesagro: |
Cobalto; Espectrofotometria. |
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Thesaurus Nal: |
cobalt. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01880naa a2200265 a 4500
001 1044204
005 2021-09-02
008 1998 bl uuuu u00u1 u #d
100 1 $aNOGUEIRA, A. R. de A.
245 $aCatalytic determination of cobalt by flow injection spectrophotometry$bapplication in animal faeces analysis using hydrochloric acid as extracting solution.$h[electronic resource]
260 $c1998
300 $ap.79-84
520 $aA flow injection system for cobalt determination in faeces of bovines and equines receiving CoEDTA as a tracer in animal nutrition studies is proposed, using 1.0 mol HCl lÿ1 as extracting medium, and detection by flow injection spectrophotometric procedure based on the catalytic effect of Co(II) on the oxidation of Tiron by hydrogen peroxide. Linearity was observed up to 8.0 mg Co lÿ1, and the detection limit was 0.2 mg Co lÿ1 (3 s blank). The system requires 0.12 mg Tiron per determination and handles 65 samples hÿ1. No baseline drift was observed during extended operation periods (8 h) and precise results (r.s.d.<1%) were detected. Accuracy was confirmed by running several faeces samples already analysed by flame atomic absorption spectrometry. Results related to the HCl extraction procedure were in close agreement with those obtained using the nitric-perchloric digestion (y0.978x0.101, R2 0.9848), suggesting that HCl extraction and flow injection determination can be used routinely for rapid analysis of cobalt in faeces.
650 $acobalt
650 $aCobalto
650 $aEspectrofotometria
653 $aFlow injection
653 $aHCI extraction
653 $aInjeção em fluxo
653 $aSpectrophotometry
700 1 $aSOUZA, G. B. de
700 1 $aBATISTA, L. A. R.
700 1 $aARRUDA, M. A. Z.
700 1 $aMIYAZAWA, M.
773 $tAnimal Feed Science and Technology.$gv.74, n.1, 1998.
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Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
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