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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 |
Biblioteca(s): |
Embrapa Pecuária Sudeste. |
Data corrente: |
12/07/2006 |
Data da última atualização: |
30/08/2013 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
DONATI, G. L.; NASCENTES, C. C.; NOGUEIRA, A. R. de A.; ARRUDA, M. A. Z.; NÓBREGA, J. A. |
Título: |
Acid extraction and cloud point preconcentration as sample preparation strategies for cobalt determination in biological materials by thermospray flame furnace atomic absorption spectrometry. |
Ano de publicação: |
2006 |
Fonte/Imprenta: |
Microchemical Journal, v.82, p.189-195, 2006. |
Idioma: |
Inglês |
Conteúdo: |
A thermospray flame furnace atomic absorption spectrometer (TS-FF-AAS) was employed for Co detennination in biological materiaIs. Cobalt presents a high atomization temperature and consequently poor sensitivity is obtained without changing its thennochemical behavior. The effect of different complexing agents on sensitivity was evaluated based on the fonnation of Co volatile compounds. A cloud point procedure was optimized for Co preconcentration for further improvement of sensitivity. Samples were treated with I moI I-I hydrochloric acid solution for quantitative extraction of Co without simultaneous extraction of Fe, since it is a strong interferent. After the extraction and preconcentration steps, a sample volume of 150 /lI was introduced into the hot Ni tube using air as carrier at a tlow-rate of 0.4 ml min- I. The best sensitivity was attained using ammonium pyrrolidinedithiocarbamate (APDC) and Triton X-114 was employed for implementation of the cloud point procedure. The detection limit obtained for Co was 2.1 /lg 1-1 and the standard deviation was 5.8% for a solution containing 100/lg I-I (n= 10). Accuracy was checked using two certified reference materiaIs (tomato leaves and bovine li ver) and results were in agreement with certified values at a 95% confidence leveI. Employing the developed procedure, Co were quantified in different biological materiaIs (plant and animal tissues). |
Palavras-Chave: |
Acid extraction; Cloud point extraction; Flame atomic absorption spectrometry; Thermospray; Tube in flame. |
Thesaurus Nal: |
cobalt. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02213naa a2200241 a 4500 001 1045669 005 2013-08-30 008 2006 bl uuuu u00u1 u #d 100 1 $aDONATI, G. L. 245 $aAcid extraction and cloud point preconcentration as sample preparation strategies for cobalt determination in biological materials by thermospray flame furnace atomic absorption spectrometry. 260 $c2006 520 $aA thermospray flame furnace atomic absorption spectrometer (TS-FF-AAS) was employed for Co detennination in biological materiaIs. Cobalt presents a high atomization temperature and consequently poor sensitivity is obtained without changing its thennochemical behavior. The effect of different complexing agents on sensitivity was evaluated based on the fonnation of Co volatile compounds. A cloud point procedure was optimized for Co preconcentration for further improvement of sensitivity. Samples were treated with I moI I-I hydrochloric acid solution for quantitative extraction of Co without simultaneous extraction of Fe, since it is a strong interferent. After the extraction and preconcentration steps, a sample volume of 150 /lI was introduced into the hot Ni tube using air as carrier at a tlow-rate of 0.4 ml min- I. The best sensitivity was attained using ammonium pyrrolidinedithiocarbamate (APDC) and Triton X-114 was employed for implementation of the cloud point procedure. The detection limit obtained for Co was 2.1 /lg 1-1 and the standard deviation was 5.8% for a solution containing 100/lg I-I (n= 10). Accuracy was checked using two certified reference materiaIs (tomato leaves and bovine li ver) and results were in agreement with certified values at a 95% confidence leveI. Employing the developed procedure, Co were quantified in different biological materiaIs (plant and animal tissues). 650 $acobalt 653 $aAcid extraction 653 $aCloud point extraction 653 $aFlame atomic absorption spectrometry 653 $aThermospray 653 $aTube in flame 700 1 $aNASCENTES, C. C. 700 1 $aNOGUEIRA, A. R. de A. 700 1 $aARRUDA, M. A. Z. 700 1 $aNÓBREGA, J. A. 773 $tMicrochemical Journal$gv.82, p.189-195, 2006.
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Embrapa Pecuária Sudeste (CPPSE) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Hortaliças. Para informações adicionais entre em contato com cnph.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Hortaliças. |
Data corrente: |
04/08/2015 |
Data da última atualização: |
04/08/2015 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 1 |
Autoria: |
MADEIRA, N. R.; BOTREL, B.; MELO, R. A. de C. e. |
Afiliação: |
NUNO RODRIGO MADEIRA, CNPH; NEIDE BOTREL, CNPH; RAPHAEL AUGUSTO DE CASTRO E MELO, CNPH. |
Título: |
Mangarito: sabor de tradição. |
Ano de publicação: |
2015 |
Fonte/Imprenta: |
Horticultura Brasileira, Brasília, DF, v. 33, n. 3, p. artigo da capa, jul./set. 2015. |
ISSN: |
0102-0536 |
Idioma: |
Português |
Palavras-Chave: |
Mangarito; X. riedelianum. |
Thesagro: |
Colheita; Propagação vegetativa; Solo. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00581naa a2200205 a 4500 001 2021351 005 2015-08-04 008 2015 bl uuuu u00u1 u #d 022 $a0102-0536 100 1 $aMADEIRA, N. R. 245 $aMangarito$bsabor de tradição.$h[electronic resource] 260 $c2015 650 $aColheita 650 $aPropagação vegetativa 650 $aSolo 653 $aMangarito 653 $aX. riedelianum 700 1 $aBOTREL, B. 700 1 $aMELO, R. A. de C. e 773 $tHorticultura Brasileira, Brasília, DF$gv. 33, n. 3, p. artigo da capa, jul./set. 2015.
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