|
|
| 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: |
14/07/2011 |
Data da última atualização: |
27/07/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
DONATI, G. L.; ROSINI, F.; NOGUEIRA, A. R. de A.; NOBREGA, J. A. |
Afiliação: |
GEORGE L. DONATI, UFSCar/SÃO CARLOS, SP; FABIANA ROSINI, UFSCar/SÃO CARLOS, SP; ANA RITA DE ARAUJO NOGUEIRA, CPPSE; JOAQUIM A. NÓBREGA, UFSCar/SÃO CARLOS, SP. |
Título: |
Focused-microwave-unduced combustion: investigation of KCIO3 thermal decomposition as O2 source. |
Ano de publicação: |
2011 |
Fonte/Imprenta: |
Analytical Methods, v. 3, n. 7, p. 1688-1691, 2011. |
DOI: |
https://doi.org/10.1039/C1AY05154G |
Idioma: |
Inglês |
Conteúdo: |
Potassium chlorate is proposed here as a chemical source of O2 in focused-microwave-induced combustion. The thermal decomposition of this compound generates enough O2 to maintain the combustion and participate in gas phase reactions responsible for HNO3 regeneration. An animal feed concentrate is the reference material and test sample used. Important parameters such as HNO3 concentration in the absorbing solution, volumes of igniting and oxidizing agents added to the sample, and microwave total incidence time were evaluated using a multivariate approach. The method efficiency was evaluated by determining both the residual carbon content (RCC) in the digestates and the recoveries of Ca, Mg, Mn, P and Zn using inductively coupled plasma optical emission spectrometry. Recoveries in the 82.3?102% range were obtained for all elements studied using 5 mL of an absorbing solution with 5.0 mol L?1 of HNO3, and adding 110 ?L of NH4NO3 6.0 mol L?1 plus 140 ?L of KClO3 0.5 mol L?1 to the solid sample, in a 7 min digestion program. A RCC value of 20% and a final acid concentration of 0.19 mol L?1 were obtained in the combustion of 100 mg of sample under optimized conditions. These preliminary results show the capabilities of a simple, inexpensive method with potential for different applications in procedures taking no longer than a few minutes. It is compatible with commercially available focused-microwave systems and requires no instrumental modification for its implementation. |
Palavras-Chave: |
Focused microwave unduced. |
Categoria do assunto: |
W Química e Física |
Marc: |
LEADER 02078naa a2200181 a 4500 001 1895884 005 2022-07-27 008 2011 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1039/C1AY05154G$2DOI 100 1 $aDONATI, G. L. 245 $aFocused-microwave-unduced combustion$binvestigation of KCIO3 thermal decomposition as O2 source.$h[electronic resource] 260 $c2011 520 $aPotassium chlorate is proposed here as a chemical source of O2 in focused-microwave-induced combustion. The thermal decomposition of this compound generates enough O2 to maintain the combustion and participate in gas phase reactions responsible for HNO3 regeneration. An animal feed concentrate is the reference material and test sample used. Important parameters such as HNO3 concentration in the absorbing solution, volumes of igniting and oxidizing agents added to the sample, and microwave total incidence time were evaluated using a multivariate approach. The method efficiency was evaluated by determining both the residual carbon content (RCC) in the digestates and the recoveries of Ca, Mg, Mn, P and Zn using inductively coupled plasma optical emission spectrometry. Recoveries in the 82.3?102% range were obtained for all elements studied using 5 mL of an absorbing solution with 5.0 mol L?1 of HNO3, and adding 110 ?L of NH4NO3 6.0 mol L?1 plus 140 ?L of KClO3 0.5 mol L?1 to the solid sample, in a 7 min digestion program. A RCC value of 20% and a final acid concentration of 0.19 mol L?1 were obtained in the combustion of 100 mg of sample under optimized conditions. These preliminary results show the capabilities of a simple, inexpensive method with potential for different applications in procedures taking no longer than a few minutes. It is compatible with commercially available focused-microwave systems and requires no instrumental modification for its implementation. 653 $aFocused microwave unduced 700 1 $aROSINI, F. 700 1 $aNOGUEIRA, A. R. de A. 700 1 $aNOBREGA, J. A. 773 $tAnalytical Methods$gv. 3, n. 7, p. 1688-1691, 2011.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
| Acesso ao texto completo restrito à biblioteca da Embrapa Algodão. Para informações adicionais entre em contato com cnpa.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Algodão. |
Data corrente: |
26/11/2001 |
Data da última atualização: |
21/07/2008 |
Autoria: |
SANTANA, J. C. F. de; LUZ, M. J. da S.; BELTRAO, N. E. de M.; SILVA JUNIOR, N.; WANDERLEY, M. J. R. |
Título: |
Caracteristicas intrinsecas da fibra do algodao cearense, safra 1999. |
Ano de publicação: |
2000 |
Fonte/Imprenta: |
Revista de Oleaginosa e Fibrasas, v.4, n.3, p.201-205, ago-dez, 2000. |
Idioma: |
Português |
Palavras-Chave: |
Beneficiadores de algodao; Brasil; Ceara; Comprimento de fibra; Fiber technology; Tecnologia de fibra. |
Thesaurus NAL: |
cotton ginning; length. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00738naa a2200253 a 4500 001 1272069 005 2008-07-21 008 2000 bl uuuu u00u1 u #d 100 1 $aSANTANA, J. C. F. de 245 $aCaracteristicas intrinsecas da fibra do algodao cearense, safra 1999. 260 $c2000 650 $acotton ginning 650 $alength 653 $aBeneficiadores de algodao 653 $aBrasil 653 $aCeara 653 $aComprimento de fibra 653 $aFiber technology 653 $aTecnologia de fibra 700 1 $aLUZ, M. J. da S. 700 1 $aBELTRAO, N. E. de M. 700 1 $aSILVA JUNIOR, N. 700 1 $aWANDERLEY, M. J. R. 773 $tRevista de Oleaginosa e Fibrasas$gv.4, n.3, p.201-205, ago-dez, 2000.
Download
Esconder MarcMostrar Marc Completo |
Registro original: |
Embrapa Algodão (CNPA) |
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
Nenhum registro encontrado para a expressão de busca informada. |
|
|