Preparation and Voltammetric Studies of Titanium (IV) Phosphate Modified with Silver Hexacyanoferrate to a Voltammetric Determination of L-Cysteine

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dc.contributor.authorCumba, Loanda Raquel [UNESP]
dc.contributor.authorBicalho, Urquisa de Oliveira [UNESP]
dc.contributor.authordo Carmo, Devaney Ribeiro [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:29:57Z
dc.date.available2014-05-20T13:29:57Z
dc.date.issued2012-05-01
dc.description.abstractIn this work, a novel Titanium (IV) Phosphate (TiPh) composite was prepared using a easily methodology of the synthesis. A preliminary characterization of the precursor and resulting materials was defined using spectroscopic and voltammetric techniques. As a second step, TiPh was reacted with silver ions (TiPhAg) and subsequent hexacyanoferrate was added (TiPhAgHCF). The electrochemical behaviour of the composite (TiPhAgHCF) was verified by means of a graphite paste electrode using cyclic voltammetry in a potential range of 0.2 to 0.9 V (vs Ag/AgCl). The cyclic voltammogram of the modified electrode containing (TiPhAgHCF) exhibited a single redox couple. The redox couple present a formal potential (E-theta) of 0.77 V vs Ag/AgCl (KNO3 1.0 mol L-1; v = 20 mV s(-1)) and ascribed to the [Fe-II(CN)(6)] / [Fe-III(CN)(6)] processes. In a electroanalytical study, the peak located at 0.77 V present a sensitive response to L-cysteine. The modified graphite paste electrode showed a linear range from 2.0x10(-4) to 9.0x10(-3) mol L-1 for the determination of L-cysteine with a limit detection of 3.34x10(-4) mol L-1 and relative standard deviation of. 5% (n = 3) and amperometric sensitivity 10.34x10(-3) A mol L-1. The modified electrode was electrochemically stable and showed excellent reproducibility.en
dc.description.affiliationUNESP Univ Estadual Paulista, Fac Engn Ilha Solteira, Dept Quim & Fis, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.affiliationUnespUNESP Univ Estadual Paulista, Fac Engn Ilha Solteira, Dept Quim & Fis, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipIdFAPESP: 03/12882-6
dc.format.extent4465-4478
dc.identifierhttp://www.electrochemsci.org/papers/vol7/7054465.pdf
dc.identifier.citationInternational Journal of Electrochemical Science. Belgrade: Electrochemical Science Group, v. 7, n. 5, p. 4465-4478, 2012.
dc.identifier.fileWOS000305267000052.pdf
dc.identifier.issn1452-3981
dc.identifier.lattes1614745697870003
dc.identifier.lattes0545046720519536
dc.identifier.urihttp://hdl.handle.net/11449/10150
dc.identifier.wosWOS:000305267000052
dc.language.isoeng
dc.publisherElectrochemical Science Group
dc.relation.ispartofInternational Journal of Electrochemical Science
dc.relation.ispartofjcr1.369
dc.relation.ispartofsjr0,366
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectTitanium (IV) phosphateen
dc.subjectcyclic voltammetryen
dc.subjectL-cysteineen
dc.titlePreparation and Voltammetric Studies of Titanium (IV) Phosphate Modified with Silver Hexacyanoferrate to a Voltammetric Determination of L-Cysteineen
dc.typeArtigo
dcterms.licensehttp://www.electrochemsci.org/instruction.htm
dcterms.rightsHolderElectrochemical Science Group
unesp.author.lattes1614745697870003
unesp.author.lattes0545046720519536
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Ilha Solteirapt

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Artigos - Física e Química - FEIS