Selective determination of caffeic acid in wines with electrochemical sensor based on molecularly imprinted siloxanes

dc.creatorLeite, FRF
dc.creatorSantos, WDR
dc.creatorKubota, LT
dc.date2014
dc.dateMAR
dc.date2014-07-30T18:31:43Z
dc.date2015-11-26T16:53:55Z
dc.date2014-07-30T18:31:43Z
dc.date2015-11-26T16:53:55Z
dc.date.accessioned2018-03-28T23:41:08Z
dc.date.available2018-03-28T23:41:08Z
dc.identifierSensors And Actuators B-chemical. Elsevier Science Sa, v. 193, n. 238, n. 246, 2014.
dc.identifier0925-4005
dc.identifierWOS:000330113600035
dc.identifier10.1016/j.snb.2013.11.028
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/71353
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/71353
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1276709
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCaffeic acid (CA) is one of the phenolic compounds widely found in wines and it is associated to the quality of this beverage and also to various beneficial effects on health. Thus, a novel electrochemical sensor based on molecularly imprinted siloxanes (MIS) film was developed for the highly selective determination of CA. The MIS film was prepared by sol-gel process, using the acid catalyzed hydrolysis and condensation of tetraethoxysilane (TEOS), phenyltriethoxysilane (PTEOS) and 3-aminopropyltrimethoxysilane (3-APTMS) in presence of CA as template molecule. The MIS film was immobilized onto Au electrode surface pre-modified with 3-mercaptopropyltrimethoxysilane (3-MPTS) and then characterized by Differential Pulse Voltammetry (DPV), Field Emission Scanning Electron Micrographs (FESEM) and Cross Polarization-Magic Angle Spinning Nuclear Magnetic Resonance of Si-29 (Si-29 CP-MAS NMR). Under the optimized conditions, the sensor showed a linear current response to the target CA concentration in the range from 0.500 to 60.0 mu mol/L, with a detection limit of 0.15 mu mol/L. The film exhibited high selectivity toward the template CA, as well as good stability and repeatability for CA determinations as well as for sensor preparation. Furthermore, the proposed sensor was applied to determine CA in wines samples and the results were in agreement with those obtained by a chromatographic method. The acceptable values of recovery implied its feasibility for practical application. (C) 2013 Elsevier B.V. All rights reserved.
dc.description193
dc.description238
dc.description246
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionInstituto Nacional de Ciencia e Tecnologia em Bioanalitica (INCTBio)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageen
dc.publisherElsevier Science Sa
dc.publisherLausanne
dc.publisherSuíça
dc.relationSensors And Actuators B-chemical
dc.relationSens. Actuator B-Chem.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectElectrochemical sensor
dc.subjectMolecularly imprinted polymer
dc.subjectSiloxanes
dc.subjectCaffeic acid
dc.subjectPerformance Liquid-chromatography
dc.subjectWalled Carbon Nanotubes
dc.subjectSolid-phase Extraction
dc.subjectSensitive Determination
dc.subjectGel Materials
dc.subjectPolyphenols
dc.subjectElectrodes
dc.subjectPolymer
dc.subjectNanoparticles
dc.subjectRecognition
dc.titleSelective determination of caffeic acid in wines with electrochemical sensor based on molecularly imprinted siloxanes
dc.typeArtículos de revistas


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