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| Registros recuperados : 4 | |
| Registros recuperados : 4 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
25/04/2003 |
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Data da última atualização: |
25/04/2003 |
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Autoria: |
AZEREDO, R. B. V.; COLNAGO, L. A.; SOUZA, A. A.; ENGELSBERG, M. |
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Afiliação: |
USP-Instituto de Química de São Carlos, São Carlos, SP.; Embrapa Instrumentação Agropecuária, São Carlos, SP.; UFPE-Departamento de Física, Recife, PE. |
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Título: |
Continuous wave free precession practical analytical tool for low-resolution nuclear magnetic resonance measurements. |
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Ano de publicação: |
0 |
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Fonte/Imprenta: |
Analytica Chimica Acta, Amsterdam, v. 478, p. 313-320, 2003. Também disponível em: www.sciencedirect.com |
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Idioma: |
Inglês |
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Conteúdo: |
The use of continuous wave free precession (CWFP) as a practical analytical tool for quantitative determinations in low-resolution nuclear magnetic resonance (LRNMR) is examined. The requirements of this technique are shown to be no more demanding than those prevailing in free-induction decay or spin-echo measurements. I is shown that the substantial gain in signal to noise ratio for a given acquisition time permitted by CWFP, can be exploited with advantage inpractically any application of LRNMR. This applies not only to homogeneous low viscosity liquid samples but also to multi-component systems where differences in relaxation times of each component permit a separation of the individual contributions. As an example, the use of CWFP for fast quantitative determination of oil and moisture in various seeds in presented. |
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Palavras-Chave: |
CWFP; Moisture analysis; NMR; Oil analysis; Ressonância magnetica nuclear; SSFP. |
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Thesagro: |
Análise; Óleo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01589naa a2200253 a 4500
001 1024686
005 2003-04-25
008 bl --- 0-- u #d
100 1 $aAZEREDO, R. B. V.
245 $aContinuous wave free precession practical analytical tool for low-resolution nuclear magnetic resonance measurements.
260 $c0
520 $aThe use of continuous wave free precession (CWFP) as a practical analytical tool for quantitative determinations in low-resolution nuclear magnetic resonance (LRNMR) is examined. The requirements of this technique are shown to be no more demanding than those prevailing in free-induction decay or spin-echo measurements. I is shown that the substantial gain in signal to noise ratio for a given acquisition time permitted by CWFP, can be exploited with advantage inpractically any application of LRNMR. This applies not only to homogeneous low viscosity liquid samples but also to multi-component systems where differences in relaxation times of each component permit a separation of the individual contributions. As an example, the use of CWFP for fast quantitative determination of oil and moisture in various seeds in presented.
650 $aAnálise
650 $aÓleo
653 $aCWFP
653 $aMoisture analysis
653 $aNMR
653 $aOil analysis
653 $aRessonância magnetica nuclear
653 $aSSFP
700 1 $aCOLNAGO, L. A.
700 1 $aSOUZA, A. A.
700 1 $aENGELSBERG, M.
773 $tAnalytica Chimica Acta, Amsterdam$gv. 478, p. 313-320, 2003. Também disponível em: www.sciencedirect.com
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Embrapa Instrumentação (CNPDIA) |
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