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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: |
04/10/2010 |
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Data da última atualização: |
30/06/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
AMAIS, R. S.; GARCIA, E. E.; MONTEIRO, M. R.; NOGUEIRA, A. R. de A.; NÓBREGA, J. A. |
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Afiliação: |
RENATA S. AMAIS, UFSCar/SÃO CARLOS, SP; EDIVALDO E. GARCIA, UNIVERSIDADE ESTADUAL DE MARINGÁ/MARINGÁ; MARCOS R. MONTEIRO, UFSCar/SÃO CARLOS, SP; ANA RITA DE ARAUJO NOGUEIRA, CPPSE; JOAQUIM A. NÓBREGA, UFSCar/SÃO CARLOS, SP. |
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Título: |
Direct analysis of biodiesel microemulsions using an inductively coupled plasma mass spectrometry . |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
Microchemical Journal, v.96, p. 146-150, 2010. |
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DOI: |
10.1016/j.microc.2010.02.017 |
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Idioma: |
Português |
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Conteúdo: |
An analytical procedure for direct introduction of biodiesel samples into an inductively coupled plasma mass spectrometer (ICP-MS) by using microemulsion for sample preparation was developed here. Cadmium, Co, Cu, Mn, Ni, Pb, Ti, and Zn were determined in biodiesel microemulsified samples prepared from different oleaginous sources (African palm, castor beans, palm, soybeans and an unknown oleaginous). Microemulsions were prepared using 0.25 mL Triton X-100, 0.25 mL 20% v v(-1) HNO3, 0.50 mL biodiesel sample and 4.0 mL n-propanol. Argon-oxygen mixture was added to the plasma as auxiliary gas for correcting matrix effects caused by the high carbon load due to biodiesel microemulsions. The oxygen gas flow rate was set in 37.5 mL min(-1). The accuracy of the developed procedure was evaluated by applying addition-recovery experiments for biodiesel samples from different sources. Recoveries varied from 76.5 to 116.2% for all analytes but Zn in castor beans biodiesel sample (65.0 to 76.2%). Recoveries lower than 86.6% were obtained for palm biodiesel sample, probably due to matrix effects. Detection limits calculated by using oxygen in the composition of the auxiliary gas added to the plasma were higher than those calculated without using it, probably due to the highest formation of oxides. Despite oxides formation, best analytical performance was reached by using oxygen as auxiliary gas and by proper correction of transport interferences. The developed procedure based on microemulsion formation was suitable for direct introduction of biodiesel samples in ICP-MS. MenosAn analytical procedure for direct introduction of biodiesel samples into an inductively coupled plasma mass spectrometer (ICP-MS) by using microemulsion for sample preparation was developed here. Cadmium, Co, Cu, Mn, Ni, Pb, Ti, and Zn were determined in biodiesel microemulsified samples prepared from different oleaginous sources (African palm, castor beans, palm, soybeans and an unknown oleaginous). Microemulsions were prepared using 0.25 mL Triton X-100, 0.25 mL 20% v v(-1) HNO3, 0.50 mL biodiesel sample and 4.0 mL n-propanol. Argon-oxygen mixture was added to the plasma as auxiliary gas for correcting matrix effects caused by the high carbon load due to biodiesel microemulsions. The oxygen gas flow rate was set in 37.5 mL min(-1). The accuracy of the developed procedure was evaluated by applying addition-recovery experiments for biodiesel samples from different sources. Recoveries varied from 76.5 to 116.2% for all analytes but Zn in castor beans biodiesel sample (65.0 to 76.2%). Recoveries lower than 86.6% were obtained for palm biodiesel sample, probably due to matrix effects. Detection limits calculated by using oxygen in the composition of the auxiliary gas added to the plasma were higher than those calculated without using it, probably due to the highest formation of oxides. Despite oxides formation, best analytical performance was reached by using oxygen as auxiliary gas and by proper correction of transport interferences. The developed procedure based on microemul... Mostrar Tudo |
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Palavras-Chave: |
Auxiliary gas; ICP-MS; Microemulsions. |
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Thesaurus Nal: |
biodiesel; oxygen. |
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Categoria do assunto: |
W Química e Física |
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Marc: |
LEADER 02288naa a2200241 a 4500
001 1863486
005 2023-06-30
008 2010 bl uuuu u00u1 u #d
024 7 $a10.1016/j.microc.2010.02.017$2DOI
100 1 $aAMAIS, R. S.
245 $aDirect analysis of biodiesel microemulsions using an inductively coupled plasma mass spectrometry .$h[electronic resource]
260 $c2010
520 $aAn analytical procedure for direct introduction of biodiesel samples into an inductively coupled plasma mass spectrometer (ICP-MS) by using microemulsion for sample preparation was developed here. Cadmium, Co, Cu, Mn, Ni, Pb, Ti, and Zn were determined in biodiesel microemulsified samples prepared from different oleaginous sources (African palm, castor beans, palm, soybeans and an unknown oleaginous). Microemulsions were prepared using 0.25 mL Triton X-100, 0.25 mL 20% v v(-1) HNO3, 0.50 mL biodiesel sample and 4.0 mL n-propanol. Argon-oxygen mixture was added to the plasma as auxiliary gas for correcting matrix effects caused by the high carbon load due to biodiesel microemulsions. The oxygen gas flow rate was set in 37.5 mL min(-1). The accuracy of the developed procedure was evaluated by applying addition-recovery experiments for biodiesel samples from different sources. Recoveries varied from 76.5 to 116.2% for all analytes but Zn in castor beans biodiesel sample (65.0 to 76.2%). Recoveries lower than 86.6% were obtained for palm biodiesel sample, probably due to matrix effects. Detection limits calculated by using oxygen in the composition of the auxiliary gas added to the plasma were higher than those calculated without using it, probably due to the highest formation of oxides. Despite oxides formation, best analytical performance was reached by using oxygen as auxiliary gas and by proper correction of transport interferences. The developed procedure based on microemulsion formation was suitable for direct introduction of biodiesel samples in ICP-MS.
650 $abiodiesel
650 $aoxygen
653 $aAuxiliary gas
653 $aICP-MS
653 $aMicroemulsions
700 1 $aGARCIA, E. E.
700 1 $aMONTEIRO, M. R.
700 1 $aNOGUEIRA, A. R. de A.
700 1 $aNÓBREGA, J. A.
773 $tMicrochemical Journal$gv.96, p. 146-150, 2010.
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Embrapa Pecuária Sudeste (CPPSE) |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
10/12/2023 |
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Data da última atualização: |
10/12/2023 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
OLIVEIRA, C. C. DE; DELMONDES, T. C.; RIBEIRO, A. B. A.; FERNANDES, L. M.; BUNGENSTAB, D. J.; MACEDO, M. C. M.; ALMEIDA, R. G. de. |
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Afiliação: |
CAROLINE CARVALHO DE OLIVEIRA, FUNDAÇÃO DE APOIO À PESQUISA E AO DESENVOLVIMENTO; TAÍS CENTURIÃO DELMONDES, UNIVERSIDADE CATÓLICA DOM BOSCO; ANA BEATRIZ A. RIBEIRO, UNIVERSIDADE FEDERAL DO RIO GRANDE DO NORTE; LEONARDO M. FERNANDES, UNIVERSIDADE ESTADUAL DE MATO GROSSO DO SUL; DAVI JOSE BUNGENSTAB, CNPGC; MANUEL CLAUDIO MOTTA MACEDO, CNPGC; ROBERTO GIOLO DE ALMEIDA, CNPGC. |
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Título: |
Performance of Brachiaria cultivars in integrated systems in the initial stage of establishment. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
In: INTERNATIONAL SYMPOSIUM ON INTEGRATED CROP-LIVESTOCK SYSTEMS, 4., CONGRESSO BRASILEIRO DE SISTEMAS INTEGRADOS DE PRODUÇÃO AGROPECUÁRIA, 3., ENCONTRO DE SISTEMAS INTEGRADOS DE PRODUÇÃO AGROPECUÁRIA NO SUL DO BRASIL, 7., Bento Gonçalves, 2023. Anais... |
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Idioma: |
Inglês |
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Notas: |
IV ICLS. |
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Conteúdo: |
ABSTRACT - Integrated systems have been encouraged by public policies in Brazil (ABC Plan, low-carbon agriculture) since the early 2010s. However, systems including forestry in their arrangement, are naturally more complex, as trees exert a direct influence on the whole system’s productivity. Goal of this work was to evaluate forage production potential and nutritive value of Brachiaria cultivars under integrated crop-livestock (ICL) and integrated crop-livestockforestry (ICLF) systems, in their initial phase, just after grass establishment. Experimental design wasrandomized block with split-plots and two replications. Treatment on plots consisted of systems (ICL and ICLF), the subplot, the cultivars of Brachiaria sp. (BRS Ipyporã, BRS Paiaguás, BRS Piatã and Ruziziensis), the sub-subplot, post-cut residue height (15 and 20 cm), and, the sub-subsubplot, seasons of the year (autumn, winter, spring and summer). Results show that shading after one year after grass establishing under integrated systems does not affect forage production and leaf crude protein content of Brachiaria cultivars. BRS Piatã produces more biomass than the other cultivars, with good leaf crude protein content. For Brachiaria cultivars, residue height at 15 cm produces greater biomass than at 20 cm. |
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Thesagro: |
Brachiaria; Forragem; Políticas Públicas; Variedade. |
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Thesaurus NAL: |
Cultivars; Forage production; Shade; Silvopastoral systems. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02350nam a2200289 a 4500
001 2159405
005 2023-12-10
008 2023 bl uuuu u00u1 u #d
100 1 $aOLIVEIRA, C. C. DE
245 $aPerformance of Brachiaria cultivars in integrated systems in the initial stage of establishment.$h[electronic resource]
260 $aIn: INTERNATIONAL SYMPOSIUM ON INTEGRATED CROP-LIVESTOCK SYSTEMS, 4., CONGRESSO BRASILEIRO DE SISTEMAS INTEGRADOS DE PRODUÇÃO AGROPECUÁRIA, 3., ENCONTRO DE SISTEMAS INTEGRADOS DE PRODUÇÃO AGROPECUÁRIA NO SUL DO BRASIL, 7., Bento Gonçalves, 2023. Anais...$c2023
500 $aIV ICLS.
520 $aABSTRACT - Integrated systems have been encouraged by public policies in Brazil (ABC Plan, low-carbon agriculture) since the early 2010s. However, systems including forestry in their arrangement, are naturally more complex, as trees exert a direct influence on the whole system’s productivity. Goal of this work was to evaluate forage production potential and nutritive value of Brachiaria cultivars under integrated crop-livestock (ICL) and integrated crop-livestockforestry (ICLF) systems, in their initial phase, just after grass establishment. Experimental design wasrandomized block with split-plots and two replications. Treatment on plots consisted of systems (ICL and ICLF), the subplot, the cultivars of Brachiaria sp. (BRS Ipyporã, BRS Paiaguás, BRS Piatã and Ruziziensis), the sub-subplot, post-cut residue height (15 and 20 cm), and, the sub-subsubplot, seasons of the year (autumn, winter, spring and summer). Results show that shading after one year after grass establishing under integrated systems does not affect forage production and leaf crude protein content of Brachiaria cultivars. BRS Piatã produces more biomass than the other cultivars, with good leaf crude protein content. For Brachiaria cultivars, residue height at 15 cm produces greater biomass than at 20 cm.
650 $aCultivars
650 $aForage production
650 $aShade
650 $aSilvopastoral systems
650 $aBrachiaria
650 $aForragem
650 $aPolíticas Públicas
650 $aVariedade
700 1 $aDELMONDES, T. C.
700 1 $aRIBEIRO, A. B. A.
700 1 $aFERNANDES, L. M.
700 1 $aBUNGENSTAB, D. J.
700 1 $aMACEDO, M. C. M.
700 1 $aALMEIDA, R. G. de
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Embrapa Gado de Corte (CNPGC) |
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