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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleSimultaneous determination of phenol isomers in binary mixtures by differential pulse voltammetry using carbon fibre electrode and neural network with pruning as a multivariate calibration toolpt_BR
dc.contributor.authorde Carvalho, RMpt_BR
dc.contributor.authorMello, Cpt_BR
dc.contributor.authorKubota, LTpt_BR
unicamp.authorUniv Estadual Campinas, Inst Chem, BR-13083970 Campinas, SP, Brazilpt_BR
dc.subjectsimultaneous determination of catechol and hydroquinonept_BR
dc.subjectelectroanalysispt_BR
dc.subjectneural networkspt_BR
dc.subjectpruningpt_BR
dc.subjectoptimal brain surgeonpt_BR
dc.subjectcarbon fibre electrodept_BR
dc.subjectdifferential pulse voltammetrypt_BR
dc.subject.wosPlanorbis-corneuspt_BR
dc.subject.wosDopaminept_BR
dc.subject.wosReleasept_BR
dc.subject.wos5-hydroxytryptaminept_BR
dc.subject.wosPerformancept_BR
dc.subject.wosGlutamatept_BR
dc.subject.wosBiosensorpt_BR
dc.subject.wosDynamicspt_BR
dc.subject.wosCellspt_BR
dc.subject.wosBrainpt_BR
dc.description.abstractNeural networks with pruning were applied to model overlapped peaks obtained in differential pulse voltammetry (DPV) with modified carbon fibre electrode with TiO2 of binary mixtures of catechol and hydroquinone. The best condition for electrochemical response was obtained with 0.05 mol l(-1) Tris-HCl buffer at pH 6.0 and T-800 sized carbon fibre electrode. Initially the voltammograms were processed using Fourier transform filter and principal component analysis (PCA) to noise reduction and data compression, respectively. The scores of these principal components were the input into the neural network and the optimal brain surgeon (OBS) was the procedure employed for pruning the neural network. The results obtained with pruning procedure were slightly better in relation to hydroquinone in comparison to the PLS1 and PLS2. However, the similar errors were obtained to catechol when using PLS or neural networks models. Using neural networks with pruning was possible to determine catechol and hydroquinone by DPV using carbon fibre electrode, in concentration range of 1.0 x 10(-4) up to 6.0x 10(-4) mol l(-1) with root mean square errors of predictions (%RMSEP) of 7.42 and 8.02, respectively. The good results show that the proposed methodology is a good alternative to simultaneous determination of catechol and hydroquinone in binary mixtures. (C) 2000 Elsevier Science B.V. All rights reserved.pt
dc.relation.ispartofAnalytica Chimica Actapt_BR
dc.relation.ispartofabbreviationAnal. Chim. Actapt_BR
dc.publisher.cityAmsterdampt_BR
dc.publisher.countryHolandapt_BR
dc.publisherElsevier Science Bvpt_BR
dc.date.issued2000pt_BR
dc.date.monthofcirculationSEP 7pt_BR
dc.identifier.citationAnalytica Chimica Acta. Elsevier Science Bv, v. 420, n. 1, n. 109, n. 121, 2000.pt_BR
dc.language.isoenpt_BR
dc.description.volume420pt_BR
dc.description.issuenumber1pt_BR
dc.description.firstpage109pt_BR
dc.description.lastpage121pt_BR
dc.rightsfechadopt_BR
dc.rights.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policypt_BR
dc.sourceWeb of Sciencept_BR
dc.identifier.issn0003-2670pt_BR
dc.identifier.wosidWOS:000089175600014pt_BR
dc.identifier.doi10.1016/S0003-2670(00)01012-6pt_BR
dc.date.available2014-12-02T16:30:12Z
dc.date.available2015-11-26T17:39:14Z-
dc.date.accessioned2014-12-02T16:30:12Z
dc.date.accessioned2015-11-26T17:39:14Z-
dc.description.provenanceMade available in DSpace on 2014-12-02T16:30:12Z (GMT). No. of bitstreams: 1 WOS000089175600014.pdf: 375885 bytes, checksum: 675529a1fa80399415dc4fb68b4c6362 (MD5) Previous issue date: 2000en
dc.description.provenanceMade available in DSpace on 2015-11-26T17:39:14Z (GMT). No. of bitstreams: 2 WOS000089175600014.pdf: 375885 bytes, checksum: 675529a1fa80399415dc4fb68b4c6362 (MD5) WOS000089175600014.pdf.txt: 42137 bytes, checksum: a359c751131f7165af9d8ee14d457628 (MD5) Previous issue date: 2000en
dc.identifier.urihttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/74211pt_BR
dc.identifier.urihttp://www.repositorio.unicamp.br/handle/REPOSIP/74211
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/74211-
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