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Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
23/03/2005 |
Data da última atualização: |
23/03/2005 |
Autoria: |
SIMÕES, F. R. |
Título: |
New electrode material for the electrochemical determination of 2,4 Diclorophenoxyacetic acid herbicide (2,4D). |
Ano de publicação: |
2003 |
Fonte/Imprenta: |
In: ENCONTRO DA SOCIEDADE BRASILEIRA DE PESQUISA EM MATERIAIS, SBPMAT, 2., out. 2003., Rio de Janeiro, RJ. Programa e Livro de resumos... Rio de Janeiro: SBPMat, 2003. Ref. A-P49. |
Idioma: |
Inglês |
Conteúdo: |
Conducting polymers have been used in many technological and scientific research applications. Due to the necessity of active materiais and great demand for different applications, the conducting polymer allows an increasing of versatility for the construction of sensors. In agriculture, in particular, the uncontrolled use of pesticide has been causing a great environmental impact, as for example the groundwater and surface water contamination. The most popular methods of pesticide analysis are the chromatographics mainly the HPLC and gas chromatography. These methods are sensible and selective, but they are laborious and expensive. Electroanalytical techniques have aIso been used as methods for pesticides determination in natural waters, soils, vegetables, fruits and other matrices. The main advantage of this method is the possibility of determining its concentration without previous treatments or separations. This work presents a new modified electrode for the determination of the herbicide 2,4 diclorophenoxyacetic acid (2,4D). This compound is known as not electroactive in electrodes as mercury, platinum and carbon (glassy, fiber or paste), but a new composite material consisting of carbon paste electrode and the conducting polymer polyaniline (PANI) was prepared, showing electroactivy and therefore, the possibility of the pesticide determination using electrochemical techniques. The analyses of the herbicide was carried out through cyclic voltammetry (C. V) in different pHs. The results showed good sensitivity and selectivity. MenosConducting polymers have been used in many technological and scientific research applications. Due to the necessity of active materiais and great demand for different applications, the conducting polymer allows an increasing of versatility for the construction of sensors. In agriculture, in particular, the uncontrolled use of pesticide has been causing a great environmental impact, as for example the groundwater and surface water contamination. The most popular methods of pesticide analysis are the chromatographics mainly the HPLC and gas chromatography. These methods are sensible and selective, but they are laborious and expensive. Electroanalytical techniques have aIso been used as methods for pesticides determination in natural waters, soils, vegetables, fruits and other matrices. The main advantage of this method is the possibility of determining its concentration without previous treatments or separations. This work presents a new modified electrode for the determination of the herbicide 2,4 diclorophenoxyacetic acid (2,4D). This compound is known as not electroactive in electrodes as mercury, platinum and carbon (glassy, fiber or paste), but a new composite material consisting of carbon paste electrode and the conducting polymer polyaniline (PANI) was prepared, showing electroactivy and therefore, the possibility of the pesticide determination using electrochemical techniques. The analyses of the herbicide was carried out through cyclic voltammetry (C. V) in different ... Mostrar Tudo |
Palavras-Chave: |
Pesticidas; Polímeros condutores. |
Categoria do assunto: |
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Marc: |
LEADER 02136naa a2200145 a 4500 001 1028888 005 2005-03-23 008 2003 bl --- 0-- u #d 100 1 $aSIMÕES, F. R. 245 $aNew electrode material for the electrochemical determination of 2,4 Diclorophenoxyacetic acid herbicide (2,4D). 260 $c2003 520 $aConducting polymers have been used in many technological and scientific research applications. Due to the necessity of active materiais and great demand for different applications, the conducting polymer allows an increasing of versatility for the construction of sensors. In agriculture, in particular, the uncontrolled use of pesticide has been causing a great environmental impact, as for example the groundwater and surface water contamination. The most popular methods of pesticide analysis are the chromatographics mainly the HPLC and gas chromatography. These methods are sensible and selective, but they are laborious and expensive. Electroanalytical techniques have aIso been used as methods for pesticides determination in natural waters, soils, vegetables, fruits and other matrices. The main advantage of this method is the possibility of determining its concentration without previous treatments or separations. This work presents a new modified electrode for the determination of the herbicide 2,4 diclorophenoxyacetic acid (2,4D). This compound is known as not electroactive in electrodes as mercury, platinum and carbon (glassy, fiber or paste), but a new composite material consisting of carbon paste electrode and the conducting polymer polyaniline (PANI) was prepared, showing electroactivy and therefore, the possibility of the pesticide determination using electrochemical techniques. The analyses of the herbicide was carried out through cyclic voltammetry (C. V) in different pHs. The results showed good sensitivity and selectivity. 653 $aPesticidas 653 $aPolímeros condutores 773 $tIn: ENCONTRO DA SOCIEDADE BRASILEIRA DE PESQUISA EM MATERIAIS, SBPMAT, 2., out. 2003., Rio de Janeiro, RJ. Programa e Livro de resumos... Rio de Janeiro: SBPMat, 2003. Ref. A-P49.
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Embrapa Instrumentação (CNPDIA) |
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Registro Completo
Biblioteca(s): |
Embrapa Unidades Centrais. |
Data corrente: |
23/08/2004 |
Data da última atualização: |
17/12/2014 |
Autoria: |
DUARTE, J.; CASTRO, A. M. G. de. |
Título: |
Comunicação e tecnologia na cadeia produtiva da soja em Mato Grosso. |
Ano de publicação: |
2004 |
Fonte/Imprenta: |
Brasilia, DF: Embrapa Informação Tecnológica: Embrapa Transferência de Tecnologia, 2004. |
Páginas: |
275 p. |
ISBN: |
85-7383-268-1 |
Idioma: |
Português |
Conteúdo: |
Agricultura, comunicação e tecnologia; Análise de fluxo de informação em cadeias produtivas, conceito e método; Fluxo de informação na cadeia produtiva da soja em Mato Grosso. |
Palavras-Chave: |
Adoção de tecnologia; Fluxo de informação. |
Thesagro: |
Agronegócio; Cadeia Produtiva; Soja; Transferência de Tecnologia. |
Categoria do assunto: |
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Marc: |
LEADER 00838nam a2200217 a 4500 001 1106277 005 2014-12-17 008 2004 bl uuuu 00u1 u #d 020 $a85-7383-268-1 100 1 $aDUARTE, J. 245 $aComunicação e tecnologia na cadeia produtiva da soja em Mato Grosso. 260 $aBrasilia, DF: Embrapa Informação Tecnológica: Embrapa Transferência de Tecnologia$c2004 300 $a275 p. 520 $aAgricultura, comunicação e tecnologia; Análise de fluxo de informação em cadeias produtivas, conceito e método; Fluxo de informação na cadeia produtiva da soja em Mato Grosso. 650 $aAgronegócio 650 $aCadeia Produtiva 650 $aSoja 650 $aTransferência de Tecnologia 653 $aAdoção de tecnologia 653 $aFluxo de informação 700 1 $aCASTRO, A. M. G. de
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