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Registro Completo |
Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
22/12/1999 |
Data da última atualização: |
06/11/2007 |
Autoria: |
VAZ, C. M. P.; MASSAROPI, M. R. C.; MACHADO, S. A. S.; MAZO, L. H.; AVACA, L. A.; CRESTANA, S. |
Afiliação: |
EMBRAPA-CNPDIA; USP-IQSC. |
Título: |
Adsorption isotherms of atrazine and 2,4-D in soils using differential pulse polarography. |
Ano de publicação: |
1996 |
Fonte/Imprenta: |
In: IUPAC GARP WORKSHOP PN PESTICIDES: USES AND ENVIRONMENTAL SAFETY IN LATIN AMERICA, Oct. 1996, Sao Paulo, SP. Book of abstracts... Sao Paulo: Sociedade Brasileira de Quimica, 1996. |
Páginas: |
p. 65. Ref.P-03. |
Idioma: |
Inglês |
Conteúdo: |
Polarographic techniques have been used to determine concentrations of many pesticides in different samples like natural waters, soils, vegetables and others. We identified in the literature over 40 active ingredients of pesticides analyzed or studied in some extend by means of polarographic techniques. In comparison with chromatography, the main technique used to analyze pesticides, the polarographic procedures are faster, cheaper and easier to be carried out. Moreover, they can be sucessfully employed for the analysis of colored materials or samples containing dispersed solid particles. The disadvantages are, in many cases, related to lower selectivity and sensitivity. The subject of this owrk is to use differential pulse polarography to determine atrazine and 2,4-D herbicide concentrations in soil samples for adsorption studies. Measurements were carried out in a model 384B Polarographic Analyzer from EG&G PARC, connected with a model 303A EG&G PARC dropping mercury electrode. Adsorption isotherms of atrazine and 2,4-D were obtained on some Brazilian soils using bath equilibrium experiments. The soil samples containing pesticide in concentration varying between 0.1 and 20 microgr.ml-1 were agitated during 24 hours and centrifuged to separate soil solution from the soil material. Concentrations of atrazine were determined directly in these solutions after adjusting pH to 2.3. The herbicide 2,4-D is not electroactive on mercury and has to undergo a nitration procedure to become electroactive... MenosPolarographic techniques have been used to determine concentrations of many pesticides in different samples like natural waters, soils, vegetables and others. We identified in the literature over 40 active ingredients of pesticides analyzed or studied in some extend by means of polarographic techniques. In comparison with chromatography, the main technique used to analyze pesticides, the polarographic procedures are faster, cheaper and easier to be carried out. Moreover, they can be sucessfully employed for the analysis of colored materials or samples containing dispersed solid particles. The disadvantages are, in many cases, related to lower selectivity and sensitivity. The subject of this owrk is to use differential pulse polarography to determine atrazine and 2,4-D herbicide concentrations in soil samples for adsorption studies. Measurements were carried out in a model 384B Polarographic Analyzer from EG&G PARC, connected with a model 303A EG&G PARC dropping mercury electrode. Adsorption isotherms of atrazine and 2,4-D were obtained on some Brazilian soils using bath equilibrium experiments. The soil samples containing pesticide in concentration varying between 0.1 and 20 microgr.ml-1 were agitated during 24 hours and centrifuged to separate soil solution from the soil material. Concentrations of atrazine were determined directly in these solutions after adjusting pH to 2.3. The herbicide 2,4-D is not electroactive on mercury and has to undergo a nitration procedure to be... Mostrar Tudo |
Palavras-Chave: |
Agricultural instrumentation; Differential pulse polarography; DPP; Herbicidas; Instrumentacao agropecuaria; Isotermos; Isotherms. |
Thesagro: |
Adsorção; Atrazina; Solo. |
Thesaurus Nal: |
adsorption; atrazine; herbicides; soil. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02615naa a2200361 a 4500 001 1027078 005 2007-11-06 008 1996 bl --- 0-- u #d 100 1 $aVAZ, C. M. P. 245 $aAdsorption isotherms of atrazine and 2,4-D in soils using differential pulse polarography. 260 $c1996 300 $ap. 65. Ref.P-03. 520 $aPolarographic techniques have been used to determine concentrations of many pesticides in different samples like natural waters, soils, vegetables and others. We identified in the literature over 40 active ingredients of pesticides analyzed or studied in some extend by means of polarographic techniques. In comparison with chromatography, the main technique used to analyze pesticides, the polarographic procedures are faster, cheaper and easier to be carried out. Moreover, they can be sucessfully employed for the analysis of colored materials or samples containing dispersed solid particles. The disadvantages are, in many cases, related to lower selectivity and sensitivity. The subject of this owrk is to use differential pulse polarography to determine atrazine and 2,4-D herbicide concentrations in soil samples for adsorption studies. Measurements were carried out in a model 384B Polarographic Analyzer from EG&G PARC, connected with a model 303A EG&G PARC dropping mercury electrode. Adsorption isotherms of atrazine and 2,4-D were obtained on some Brazilian soils using bath equilibrium experiments. The soil samples containing pesticide in concentration varying between 0.1 and 20 microgr.ml-1 were agitated during 24 hours and centrifuged to separate soil solution from the soil material. Concentrations of atrazine were determined directly in these solutions after adjusting pH to 2.3. The herbicide 2,4-D is not electroactive on mercury and has to undergo a nitration procedure to become electroactive... 650 $aadsorption 650 $aatrazine 650 $aherbicides 650 $asoil 650 $aAdsorção 650 $aAtrazina 650 $aSolo 653 $aAgricultural instrumentation 653 $aDifferential pulse polarography 653 $aDPP 653 $aHerbicidas 653 $aInstrumentacao agropecuaria 653 $aIsotermos 653 $aIsotherms 700 1 $aMASSAROPI, M. R. C. 700 1 $aMACHADO, S. A. S. 700 1 $aMAZO, L. H. 700 1 $aAVACA, L. A. 700 1 $aCRESTANA, S. 773 $tIn: IUPAC GARP WORKSHOP PN PESTICIDES: USES AND ENVIRONMENTAL SAFETY IN LATIN AMERICA, Oct. 1996, Sao Paulo, SP. Book of abstracts... Sao Paulo: Sociedade Brasileira de Quimica, 1996.
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Embrapa Instrumentação (CNPDIA) |
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Registros recuperados : 7 | |
1. | | SILVA, J. C. C.; FERNANDES, C. de F.; VIEIRA JUNIOR, J. R.; REIS, N. D.; SOUZA, J. L.; LIMA, R. F.; ANTUNES JÚNIOR, H.; OLIVEIRA, M. S. A.; SILVA, D. S. G. da. Avaliação bioquímica da atividade catalásica e fenilalanina amônia liásica em folhas de bananeira inoculadas com fungo Mycosphaerella fijiensis. In: ENCONTRO DE INICIAÇÃO À PESQUISA DA EMBRAPA RONDÔNIA, 1., 2010, Porto Velho. Anais... Porto Velho: Embrapa Rondônia, 2010. 40p. (Embrapa Rondônia. Documentos, 140).Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Rondônia. |
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2. | | SOUZA, J. L.; FERNANDES, C. de F.; VIEIRA JUNIOR, J. R.; LIMA, R. F.; SILVA, J. C. C.; ANTUNES JÚNIOR, H.; OLIVEIRA, M. S. A.; SILVA, D. S. G. da. Avaliação bioquímica da atividade glucanásica e quitinásica em folhas de bananeira inoculadas com fungo Mycosphaerella fijiensis. In: ENCONTRO DE INICIAÇÃO À PESQUISA DA EMBRAPA RONDÔNIA, 1., 2010, Porto Velho. Anais... Porto Velho: Embrapa Rondônia, 2010. 40p. (Embrapa Rondônia. Documentos, 140).Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Rondônia. |
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3. | | LIMA, R. F.; FERNANDES, C. de F.; VIEIRA JUNIOR, J. R.; REIS, N. D.; SOUZA, J. L.; SILVA, J. C. C.; ANTUNES JÚNIOR, H.; OLIVEIRA, M. S. A.; SILVA, D. S. G. da. Avaliação bioquímica da atividade peroxidásica, ascorbato peroxidase e dismutases de superóxido em folhas de bananeira inoculadas com fungo Mycosphaerella fijiensis. In: ENCONTRO DE INICIAÇÃO À PESQUISA DA EMBRAPA RONDÔNIA, 1., 2010, Porto Velho. Anais... Porto Velho: Embrapa Rondônia, 2010. 40p. (Embrapa Rondônia. Documentos, 140).Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Rondônia. |
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4. | | ANTUNES JÚNIOR, H.; VIEIRA JUNIOR, J. R.; FERNANDES, C. de F.; OLIVEIRA, M. S. A.; LIMA, R. F.; SOUZA, J. L.; SILVA, J. C. C.; SILVA, D. S. G. da. Antagonismo em vitro: método acessório para seleção de rizobactéria para controle da mela (Thanatephorus cucumeris) do feijoeiro comum (Phaseolus vulgaris L.). In: ENCONTRO DE INICIAÇÃO À PESQUISA DA EMBRAPA RONDÔNIA, 1., 2010, Porto Velho. Anais... Porto Velho: Embrapa Rondônia, 2010. 40p. (Embrapa Rondônia. Documentos, 140).Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Rondônia. |
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5. | | TAVARES, S. C. C. de H.; CRUZ, S. C. da; BATISTA, D. da C.; NEVES, R. A. F. das; OLIVEIRA, M. S. A. de; COSTA, V. S. de O. Mix de Trichoderma spp. no controle biológico de hortifrutífera no semi-árido brasileiro. REUNIÃO NACIONAL DE CONTROLE BIOLÓGICO DE FITOPATÓGENOS, 7., 2001, Bento Gonçalves. Anais... Bento Gonçalves: Embrapa Uva e Vinho, 2001. p. 78.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Semiárido. |
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6. | | ANTUNES JÚNIOR, H.; VIEIRA JUNIOR, J. R.; FERNANDES, C. de F.; OLIVEIRA, M. S. A.; LIMA, R. F.; SOUZA, J. L.; SILVA, J. C. C.; SILVA, D. S. G. da. Seleção de rizobactérias autóctones para controle da mela (Thanatephorus cucumeris) do feijoeiro comum (Phaseolus vulgaris L.). In: ENCONTRO DE INICIAÇÃO À PESQUISA DA EMBRAPA RONDÔNIA, 1., 2010, Porto Velho. Anais... Porto Velho: Embrapa Rondônia, 2010. 40p. (Embrapa Rondônia. Documentos, 140).Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Rondônia. |
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7. | | OLIVEIRA, M. S. A; VIEIRA JUNIOR, J. R.; FERNANDES, C. de F.; ANTUNES JÚNIOR, H.; LIMA, R. F.; SOUZA, J. L.; SILVA, J. C. C.; SILVA, D. S. G. da. Seleção e testagem de rizobactérias autóctones para a promoção de crescimento de feijoeiro comum (Phaseolus vulgaris L.). In: ENCONTRO DE INICIAÇÃO À PESQUISA DA EMBRAPA RONDÔNIA, 1., 2010, Porto Velho. Anais... Porto Velho: Embrapa Rondônia, 2010. 40p. (Embrapa Rondônia. Documentos, 140).Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Rondônia. |
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Registros recuperados : 7 | |
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Nenhum registro encontrado para a expressão de busca informada. |
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