Voltammetric behaviour of a modified electrode with azide copper octa(3-aminopropyl)octasilsesquioxane composite in the oxidation of ascorbic acid

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorCarmo, Devaney Ribeiro do
dc.creatorPaim, Leonardo Lataro
dc.creatorSilvestrini, Daniela Rodrigues
dc.creatorSá, Acelino Cardoso de
dc.creatorBicalho, Urquisa de Oliveira
dc.creatorStradiotto, Nelson Ramos
dc.date2015-05-15T13:30:23Z
dc.date2016-10-25T20:48:40Z
dc.date2015-05-15T13:30:23Z
dc.date2016-10-25T20:48:40Z
dc.date2011
dc.date.accessioned2017-04-06T08:17:03Z
dc.date.available2017-04-06T08:17:03Z
dc.identifierInternational Journal of Electrochemical Science, v. 6, p. 1175-1188, 2011.
dc.identifier1452-3981
dc.identifierhttp://hdl.handle.net/11449/123542
dc.identifierhttp://acervodigital.unesp.br/handle/11449/123542
dc.identifierISSN1452-3981-2011-06-1175-1188.pdf
dc.identifier0072173018005712
dc.identifier0545046720519536
dc.identifier4328309612941987
dc.identifier7585418188222148
dc.identifier3065586932979372
dc.identifier1614745697870003
dc.identifierhttp://www.electrochemsci.org/list11.htm
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/934153
dc.descriptionA novel nanostructured composite, azide copper octa (3-aminopropyl)octasilsesquioxane (ASCA) was incorporated into a graphite paste electrode and the electrochemical studies were conducted with cyclic voltammetry. The cyclic voltammogram of the modified graphite paste electrode with ASCA (GPE-ASCA), showed one redox couple with formal potential (E  ) = 0.30 V and an irreversible process at 1.1 V (vs Ag/AgCl; NaCl 1.0 mol L-1 ; v = 20 mV s-1 ). The redox couple with (E  ) = 0.30V presents an electrocatalytic response for determination of ascorbic acid. The modified electrode gives a linear range from 1.010-4 – 1.010-3 mol L-1 (r = 0.998) for the determination of ascorbic acid with detection limit of 6.910-5 mol L-1 and standard deviation of 2.3% for n = 3 . The amperometric sensitivity was 122.1 mA/mol L-1 for ascorbic acid. The application this electrode was tested and ascorbic acid in three commercial pharmaceutical product (Cebion, Cewin and Redoxon) have been determined.
dc.languageeng
dc.relationInternational Journal of Electrochemical Science
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectSilsesquioxane
dc.subjectascorbic acid
dc.subjectgraphite paste electrode
dc.subjectvoltammetry
dc.subjectmodified electrode
dc.titleVoltammetric behaviour of a modified electrode with azide copper octa(3-aminopropyl)octasilsesquioxane composite in the oxidation of ascorbic acid
dc.typeOtro


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