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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Solos. |
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Data corrente: |
02/12/1996 |
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Data da última atualização: |
22/11/2002 |
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Autoria: |
FREITAS, P. L. de; BLANCANEAUX, P.; MOREAU, R. |
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Título: |
A analise morfo-estrutural como uma ferramenta para a avaliacao da sustentabilidade de sistemas agrossilvipastoris nos cerrados. |
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Ano de publicação: |
1996 |
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Fonte/Imprenta: |
In: SIMPOSIO SOBRE O CERRADO, 8.; INTERNATIONAL SYMPOSIUM ON TROPICAL SAVANNAS, 1., 1996, Brasilia, DF. Anais... Planaltina: EMBRAPA-CPAC, 1996. p.400-405. |
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Idioma: |
Português |
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Conteúdo: |
A analise morfo-estrutural e proposta como um metodo para caracterizacao da condicao estrutural do solo, indicadora da sustentabilidade dos sistemas agrossilvipastoris nos Cerrados. Baseado na caracterizacao morfologica do estado estrutural, o metodo visa a verificacao dos efeitos da utilizacao agricola dos solos e a racionalizacao na determinacao de suas caracteristicas quimicas, fisicas e da dinamica da materia organica. O metodo constitui uma ferramenta para diagnostico do impacto de diferentes sistemas de manejo e de culturas, e para identificacao de processos de degradacao do solo, alem de ser util em experimentos conduzidos em propriedades rurais ou de longa duracao em estacoes experimentais. |
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Palavras-Chave: |
Agrosilvopastoral systems; BIBJICACPAC; Brasil; Morfologia do solo; Sistema agrossilvipastoril; Sustainability; Sustentabilidade. |
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Thesagro: |
Cerrado; Estrutura do Solo; Solo. |
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Thesaurus Nal: |
Brazil; soil morphological features; soil structure. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01689naa a2200301 a 4500
001 1331641
005 2002-11-22
008 1996 bl uuuu u00u1 u #d
100 1 $aFREITAS, P. L. de
245 $aA analise morfo-estrutural como uma ferramenta para a avaliacao da sustentabilidade de sistemas agrossilvipastoris nos cerrados.
260 $c1996
520 $aA analise morfo-estrutural e proposta como um metodo para caracterizacao da condicao estrutural do solo, indicadora da sustentabilidade dos sistemas agrossilvipastoris nos Cerrados. Baseado na caracterizacao morfologica do estado estrutural, o metodo visa a verificacao dos efeitos da utilizacao agricola dos solos e a racionalizacao na determinacao de suas caracteristicas quimicas, fisicas e da dinamica da materia organica. O metodo constitui uma ferramenta para diagnostico do impacto de diferentes sistemas de manejo e de culturas, e para identificacao de processos de degradacao do solo, alem de ser util em experimentos conduzidos em propriedades rurais ou de longa duracao em estacoes experimentais.
650 $aBrazil
650 $asoil morphological features
650 $asoil structure
650 $aCerrado
650 $aEstrutura do Solo
650 $aSolo
653 $aAgrosilvopastoral systems
653 $aBIBJICACPAC
653 $aBrasil
653 $aMorfologia do solo
653 $aSistema agrossilvipastoril
653 $aSustainability
653 $aSustentabilidade
700 1 $aBLANCANEAUX, P.
700 1 $aMOREAU, R.
773 $tIn: SIMPOSIO SOBRE O CERRADO, 8.; INTERNATIONAL SYMPOSIUM ON TROPICAL SAVANNAS, 1., 1996, Brasilia, DF. Anais... Planaltina: EMBRAPA-CPAC, 1996. p.400-405.
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Registro original: |
Embrapa Solos (CNPS) |
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Registro |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação; Embrapa Soja. |
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Data corrente: |
29/12/2022 |
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Data da última atualização: |
29/12/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
BORDUCHI, L. C. L.; MILORI, D. M. B. P.; MEYER, M. C.; VILLAS-BOAS, P. R. |
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Afiliação: |
DEBORA MARCONDES BASTOS PEREIRA, CNPDIA; MAURICIO CONRADO MEYER, CNPSO; PAULINO RIBEIRO VILLAS BOAS, CNPDIA. |
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Título: |
Reducing matrix effects on the quantification of Ca, Mg, and Fe in soybean leaf samples using calibration-free LIBS and one-point calibration. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Spectrochimica Acta Part B: Atomic Spectroscopy, v. 198, a106561, 2022. |
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Páginas: |
1 - 9 |
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ISSN: |
0584-8547 |
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DOI: |
https://doi.org/10.1016/j.sab.2022.106561 |
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Idioma: |
Inglês |
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Conteúdo: |
Matrix effects are one of the most difficult analytical challenges in laser-induced breakdown spectroscopy (LIBS), since signal intensity depends on both element concentration and matrix. For instance, the measurement of nutrients in plant leaves using LIBS is notably impacted by matrix effects because of differences in fertilizer application, weather, soil properties, and health levels. Thus, to overcome matrix effects on the quantification of nutrients in plant leaves, we propose the use of CF-LIBS, in which the intensity of emission lines is corrected using the one-point calibration (OPC) method. In this study, we analyzed thirty soybean leaf samples of cultivars from various locations and health levels with 0.5 wt% TiO2 (internal standard), for which the matrix effects were visible in the calibration curves. Normalization using a Ti II line increased the average r 2 of the calibration curves for Ca II, Mg II, and Fe II from 0.24 to 0.73, but this was insufficient to adjust for the variations in plasma temperature and for the degree to which the elements were ionized. With the proposed models and using just one sample to calibrate the OPC factors, we obtained an accuracy >92% and an average r 2 of 0.87 for the quantification of Ca, Mg, and Fe in relation to the atomic absorption spectroscopy (AAS). We then concluded that CFLIBS with the OPC corrections might mitigate matrix effects in LIBS analysis of soybean leaf samples. More studies are needed to assess whether the OPC factors calibrated with soybean leaf samples can be applied to other species. MenosMatrix effects are one of the most difficult analytical challenges in laser-induced breakdown spectroscopy (LIBS), since signal intensity depends on both element concentration and matrix. For instance, the measurement of nutrients in plant leaves using LIBS is notably impacted by matrix effects because of differences in fertilizer application, weather, soil properties, and health levels. Thus, to overcome matrix effects on the quantification of nutrients in plant leaves, we propose the use of CF-LIBS, in which the intensity of emission lines is corrected using the one-point calibration (OPC) method. In this study, we analyzed thirty soybean leaf samples of cultivars from various locations and health levels with 0.5 wt% TiO2 (internal standard), for which the matrix effects were visible in the calibration curves. Normalization using a Ti II line increased the average r 2 of the calibration curves for Ca II, Mg II, and Fe II from 0.24 to 0.73, but this was insufficient to adjust for the variations in plasma temperature and for the degree to which the elements were ionized. With the proposed models and using just one sample to calibrate the OPC factors, we obtained an accuracy >92% and an average r 2 of 0.87 for the quantification of Ca, Mg, and Fe in relation to the atomic absorption spectroscopy (AAS). We then concluded that CFLIBS with the OPC corrections might mitigate matrix effects in LIBS analysis of soybean leaf samples. More studies are needed to assess whether the OPC... Mostrar Tudo |
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Palavras-Chave: |
Calibration-free; LIBS; Matrix effects; Soybean leaf samples. |
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Thesagro: |
Espectrometria; Soja. |
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Thesaurus NAL: |
Calibration; Lasers; Soybeans; Spectroscopy. |
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Categoria do assunto: |
--
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02534naa a2200313 a 4500
001 2150485
005 2022-12-29
008 2022 bl uuuu u00u1 u #d
022 $a0584-8547
024 7 $ahttps://doi.org/10.1016/j.sab.2022.106561$2DOI
100 1 $aBORDUCHI, L. C. L.
245 $aReducing matrix effects on the quantification of Ca, Mg, and Fe in soybean leaf samples using calibration-free LIBS and one-point calibration.$h[electronic resource]
260 $c2022
300 $a1 - 9
520 $aMatrix effects are one of the most difficult analytical challenges in laser-induced breakdown spectroscopy (LIBS), since signal intensity depends on both element concentration and matrix. For instance, the measurement of nutrients in plant leaves using LIBS is notably impacted by matrix effects because of differences in fertilizer application, weather, soil properties, and health levels. Thus, to overcome matrix effects on the quantification of nutrients in plant leaves, we propose the use of CF-LIBS, in which the intensity of emission lines is corrected using the one-point calibration (OPC) method. In this study, we analyzed thirty soybean leaf samples of cultivars from various locations and health levels with 0.5 wt% TiO2 (internal standard), for which the matrix effects were visible in the calibration curves. Normalization using a Ti II line increased the average r 2 of the calibration curves for Ca II, Mg II, and Fe II from 0.24 to 0.73, but this was insufficient to adjust for the variations in plasma temperature and for the degree to which the elements were ionized. With the proposed models and using just one sample to calibrate the OPC factors, we obtained an accuracy >92% and an average r 2 of 0.87 for the quantification of Ca, Mg, and Fe in relation to the atomic absorption spectroscopy (AAS). We then concluded that CFLIBS with the OPC corrections might mitigate matrix effects in LIBS analysis of soybean leaf samples. More studies are needed to assess whether the OPC factors calibrated with soybean leaf samples can be applied to other species.
650 $aCalibration
650 $aLasers
650 $aSoybeans
650 $aSpectroscopy
650 $aEspectrometria
650 $aSoja
653 $aCalibration-free
653 $aLIBS
653 $aMatrix effects
653 $aSoybean leaf samples
700 1 $aMILORI, D. M. B. P.
700 1 $aMEYER, M. C.
700 1 $aVILLAS-BOAS, P. R.
773 $tSpectrochimica Acta Part B: Atomic Spectroscopy$gv. 198, a106561, 2022.
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Embrapa Instrumentação (CNPDIA) |
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