Voltammetric determination of ethyl acetate in ethanol fuel using a Fe 3+/Nafion®-coated glassy carbon electrode

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorCaetano, Lahys G.
dc.creatorTakeuchi, Regina M.
dc.creatorSantos, André L.
dc.creatorDe Oliveira, Marcelo F.
dc.creatorStradiotto, Nelson Ramos
dc.date2014-05-27T11:28:10Z
dc.date2016-10-25T18:42:43Z
dc.date2014-05-27T11:28:10Z
dc.date2016-10-25T18:42:43Z
dc.date2013-01-14
dc.date.accessioned2017-04-06T02:10:12Z
dc.date.available2017-04-06T02:10:12Z
dc.identifierFuel, v. 106, p. 837-842.
dc.identifier0016-2361
dc.identifierhttp://hdl.handle.net/11449/74374
dc.identifierhttp://acervodigital.unesp.br/handle/11449/74374
dc.identifier10.1016/j.fuel.2012.10.045
dc.identifierWOS:000316190200101
dc.identifier2-s2.0-84875481623
dc.identifierhttp://dx.doi.org/10.1016/j.fuel.2012.10.045
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/895141
dc.descriptionA voltammetric method for the determination of ethyl acetate in ethanol fuel using a Fe3+/Nafion®-coated glassy carbon electrode (GCE) is proposed. The ethyl acetate present in the ethanol fuel was previously converted to acetohydroxamic acid via pretreatment with hydroxylamine chloride. The acetohydroxamic acid promptly reacted with the iron (III) present in the film, producing iron (III) acetohydroxamate, which presents a well-defined voltammetric peak current at -0.02 V. Optimization of the voltammetric parameters for the cyclic, linear sweep, square wave, and differential pulse modalities was carried out for this chemically-modified electrode. Square wave voltammetry afforded the best response for acetohydroxamic acid detection. The analytical curve for this species was linear from 9 to 100 μmol L 1 according to the following equation: ip (μA) = 0.27 + 2.55Cacetohydroxamic acid (μmol L 1), with linear correlation coefficient equal to 0.993. The technique presented limit of detection equal to 5.3 μmol L 1 and quantification limit of 17.6 μmol L 1. The proposed method was compared to the official method of ethyl acetate analysis (Gas Chromatography), and a satisfactory correlation was found between these techniques. © 2012 Elsevier Ltd. All rights reserved.
dc.languageeng
dc.relationFuel
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectChemically modified electrode
dc.subjectEthanol fuel
dc.subjectEthyl acetate
dc.subjectQuality control
dc.subjectVoltammetry
dc.subjectAcetohydroxamic acids
dc.subjectEthyl acetates
dc.subjectGlassy carbon electrodes
dc.subjectLinear correlation coefficient
dc.subjectSquare wave voltammetry
dc.subjectVoltammetric determination
dc.subjectVoltammetric parameters
dc.subjectChlorine compounds
dc.subjectEthanol fuels
dc.subjectGas chromatography
dc.subjectGlass
dc.subjectGlass membrane electrodes
dc.titleVoltammetric determination of ethyl acetate in ethanol fuel using a Fe 3+/Nafion®-coated glassy carbon electrode
dc.typeOtro


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