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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. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
20/09/2021 |
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Data da última atualização: |
10/06/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MORAIS, C. P. de; NICOLODELLI, G.; FOSCHINI, M. M.; SILVA, K. S. G. da; MAUAD, F. F.; MOUNIER, S.; MILORI, D. M. B. P. |
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Afiliação: |
MILENE CORSO MITSUYUKI, CNPDIA; DEBORA MARCONDES BASTOS PEREIRA, CNPDIA. |
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Título: |
Total phosphorus determination in eutrophic tropical river sediments by laser-induced breakdown spectroscopy techniques. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Analytical Methods, v. 13, 2021. |
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Páginas: |
77 - 83 |
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ISSN: |
1759-9660 |
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DOI: |
10.1039/d0ay02008g |
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Idioma: |
Inglês |
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Conteúdo: |
Total phosphorus (TP) in sediments is an important chemical variable in the study of the extent of eutrophication in water bodies. Two methods, based on single pulse (SP) and double pulse (DP) laserinduced breakdown spectroscopy (LIBS), were developed for determining TP in the sediment cores of Brazilian rivers upstream from the Barra Bonita reservoir. TP concentration in the sediments was determined by inductively coupled plasma optical emission spectrometry (ICP OES) on digested samples. Besides, a LIBS system operating in SP and DP modes was used to develop methods for TP quantification in sediment pellets. In LIBS, the most appropriate wavelength to measure P was 214.91 nm. The calibration curves showed correlation coefficients of 0.93 and 0.92 and limits of detection of 709 mg kg#1;1 and 349 mg kg#1;1 for SP and DP LIBS, respectively. The two proposed methods were validated and the average percentage errors were 14% and 10% for SP and DP LIBS, respectively. The ICP OES and SP and DP LIBS data showed that the most superficial layers of the Piracicaba River, all the sedimentary layers of the Tiete River, and the con ˆ fluence region present a high concentration of TP, according to the Brazilian sediment quality criterion. In conclusion, SP and DP LIBS were confirmed as promising alternative tools to traditional analytical methods for monitoring the TP content in the sediments that come from different hydrographic units. The proposed method using DP LIBS proved more sensitive than SP LIBS, but the SP LIBS method demonstrated enough precision for determining TP in eutrophic river sediments. MenosTotal phosphorus (TP) in sediments is an important chemical variable in the study of the extent of eutrophication in water bodies. Two methods, based on single pulse (SP) and double pulse (DP) laserinduced breakdown spectroscopy (LIBS), were developed for determining TP in the sediment cores of Brazilian rivers upstream from the Barra Bonita reservoir. TP concentration in the sediments was determined by inductively coupled plasma optical emission spectrometry (ICP OES) on digested samples. Besides, a LIBS system operating in SP and DP modes was used to develop methods for TP quantification in sediment pellets. In LIBS, the most appropriate wavelength to measure P was 214.91 nm. The calibration curves showed correlation coefficients of 0.93 and 0.92 and limits of detection of 709 mg kg#1;1 and 349 mg kg#1;1 for SP and DP LIBS, respectively. The two proposed methods were validated and the average percentage errors were 14% and 10% for SP and DP LIBS, respectively. The ICP OES and SP and DP LIBS data showed that the most superficial layers of the Piracicaba River, all the sedimentary layers of the Tiete River, and the con ˆ fluence region present a high concentration of TP, according to the Brazilian sediment quality criterion. In conclusion, SP and DP LIBS were confirmed as promising alternative tools to traditional analytical methods for monitoring the TP content in the sediments that come from different hydrographic units. The proposed method using DP LIBS proved more sensit... Mostrar Tudo |
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Palavras-Chave: |
Chemical variable; Piracicaba River; SP and DP LIBS. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02401naa a2200265 a 4500
001 2134588
005 2022-06-10
008 2021 bl uuuu u00u1 u #d
022 $a1759-9660
024 7 $a10.1039/d0ay02008g$2DOI
100 1 $aMORAIS, C. P. de
245 $aTotal phosphorus determination in eutrophic tropical river sediments by laser-induced breakdown spectroscopy techniques.$h[electronic resource]
260 $c2021
300 $a77 - 83
520 $aTotal phosphorus (TP) in sediments is an important chemical variable in the study of the extent of eutrophication in water bodies. Two methods, based on single pulse (SP) and double pulse (DP) laserinduced breakdown spectroscopy (LIBS), were developed for determining TP in the sediment cores of Brazilian rivers upstream from the Barra Bonita reservoir. TP concentration in the sediments was determined by inductively coupled plasma optical emission spectrometry (ICP OES) on digested samples. Besides, a LIBS system operating in SP and DP modes was used to develop methods for TP quantification in sediment pellets. In LIBS, the most appropriate wavelength to measure P was 214.91 nm. The calibration curves showed correlation coefficients of 0.93 and 0.92 and limits of detection of 709 mg kg#1;1 and 349 mg kg#1;1 for SP and DP LIBS, respectively. The two proposed methods were validated and the average percentage errors were 14% and 10% for SP and DP LIBS, respectively. The ICP OES and SP and DP LIBS data showed that the most superficial layers of the Piracicaba River, all the sedimentary layers of the Tiete River, and the con ˆ fluence region present a high concentration of TP, according to the Brazilian sediment quality criterion. In conclusion, SP and DP LIBS were confirmed as promising alternative tools to traditional analytical methods for monitoring the TP content in the sediments that come from different hydrographic units. The proposed method using DP LIBS proved more sensitive than SP LIBS, but the SP LIBS method demonstrated enough precision for determining TP in eutrophic river sediments.
653 $aChemical variable
653 $aPiracicaba River
653 $aSP and DP LIBS
700 1 $aNICOLODELLI, G.
700 1 $aFOSCHINI, M. M.
700 1 $aSILVA, K. S. G. da
700 1 $aMAUAD, F. F.
700 1 $aMOUNIER, S.
700 1 $aMILORI, D. M. B. P.
773 $tAnalytical Methods$gv. 13, 2021.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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Biblioteca |
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Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
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URL |
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Registro Completo
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Biblioteca(s): |
Embrapa Hortaliças. |
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Data corrente: |
04/05/2018 |
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Data da última atualização: |
04/05/2018 |
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Tipo da produção científica: |
Artigo de Divulgação na Mídia |
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Autoria: |
QUEZADO-DUVAL, A. M.; LOURENÇO JUNIOR, V. |
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Afiliação: |
ALICE MARIA QUEZADO DUVAL, CNPH; VALDIR LOURENCO JUNIOR, CNPH. |
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Título: |
Manejo de doenças foliares do tomateiro. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Hortaliças em Revista, Brasília, DF, Ano 7, n. 24, p. 12-13, jan./abr. 2018. |
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ISSN: |
2359-3172 |
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Idioma: |
Português |
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Conteúdo: |
Por ser uma uma planta hospedeira de um número elevado de fitopatógenos, a ocorrência de doenças é um dos principais fatores limitantes na produção de tomate, para combater essas doenças os produtores chegam a realizar aplicações frequentes de produtos de proteção fitossanitária, que são componentes significativos do custo de produção. No entanto, produtores e técnicos devem ter um conhecimento amplo sobre a natureza dos patógenos causadores das doenças suas relações com o ambiente e as ferramentas disponíveis no mercado que possam ser economicamente aplicáveis em cada sistema produtivo. |
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Thesagro: |
Fungicida; Mancha Bacteriana; Requeima; Septoriose; Tomate; Tratamento Fitossanitário. |
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Categoria do assunto: |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/176372/1/digitalizar0022.pdf
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Marc: |
LEADER 01216nam a2200205 a 4500
001 2091169
005 2018-05-04
008 2018 bl uuuu u00u1 u #d
022 $a2359-3172
100 1 $aQUEZADO-DUVAL, A. M.
245 $aManejo de doenças foliares do tomateiro.$h[electronic resource]
260 $aHortaliças em Revista, Brasília, DF, Ano 7, n. 24, p. 12-13, jan./abr. 2018.$c2018
520 $aPor ser uma uma planta hospedeira de um número elevado de fitopatógenos, a ocorrência de doenças é um dos principais fatores limitantes na produção de tomate, para combater essas doenças os produtores chegam a realizar aplicações frequentes de produtos de proteção fitossanitária, que são componentes significativos do custo de produção. No entanto, produtores e técnicos devem ter um conhecimento amplo sobre a natureza dos patógenos causadores das doenças suas relações com o ambiente e as ferramentas disponíveis no mercado que possam ser economicamente aplicáveis em cada sistema produtivo.
650 $aFungicida
650 $aMancha Bacteriana
650 $aRequeima
650 $aSeptoriose
650 $aTomate
650 $aTratamento Fitossanitário
700 1 $aLOURENÇO JUNIOR, V.
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