Dichlorophenoxyacetic acid anchored on silica-gel modified carbon paste for the determination of pesticide 2,4-D

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dc.creatorPrado, Alexandre Gustavo Soares
dc.creatorBarcelos, Hernane de Toledo
dc.creatorMoura, Aline Oliveira
dc.creatorNunes, Alécio Rodrigues
dc.creatorGil, Eric de Souza
dc.date.accessioned2020-02-03T14:32:54Z
dc.date.available2020-02-03T14:32:54Z
dc.date.issued2012
dc.description.abstract2,4-dichlorophexoyacetic acid was attached onto silica gel. For this immobilization, in the first step, 3-aminopropyltrimethoxysilane was attached onto silica gel surface in order to produce the precursor silica. The 2,4-dichlorophexoyacetic acid was incorporated onto precursor silica by reaction between chloride of 2,4-dichlorophexoyacetic acid and amine group precursor silica, forming a covalent bond of between 2,4-dichlorophexoyacetic acid to and the inorganic surface, resulting in the production of SiD material. Then, 1.02 mmol of 2,4-dichlorophexoyacetic acid per gram of silica exhibited a surface area of 250 m2/g. Infrared and 29Si NMR spectra were in agreement with the proposed structure of the modified silica. This modified silica was applied to develop a chemical carbon paste electrode to determine pesticide 2,4-D in water. Voltammetric studies showed that the 2,4-D electrochemical reduction involved 4 electrons for each 2,4-D molecule reduction. Detection and quantification limits of 2,4-D in water were 0.45 μmol/L.pt_BR
dc.identifier.citationPRADO, Alexandre G. S. et al. Dichlorophenoxyacetic acid anchored on silica-gel modified carbon paste for the determination of pesticide 2,4-D. International Journal of Electrochemical Science, Belgrade, v. 7, p. 8929-8939, 2012.pt_BR
dc.identifier.issn1452-3981
dc.identifier.urihttp://repositorio.bc.ufg.br/handle/ri/18598
dc.language.isoengpt_BR
dc.publisher.countryOutrospt_BR
dc.publisher.departmentFaculdade de Farmácia - FF (RG)pt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectDichlorophenoxyacetic acidpt_BR
dc.subjectChronoamperometrypt_BR
dc.subjectPesticide 2,4-D,carbon paste electrodept_BR
dc.subjectCyclic voltammetrypt_BR
dc.titleDichlorophenoxyacetic acid anchored on silica-gel modified carbon paste for the determination of pesticide 2,4-Dpt_BR
dc.typeArtigopt_BR

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