Voltammetric behaviour of a modified electrode with azide copper octa(3-aminopropyl)octasilsesquioxane composite in the oxidation of ascorbic acid
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://www.electrochemsci.org/list11.htm http://hdl.handle.net/11449/123542 |
Resumo: | A 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 1.010-4 – 1.010-3 mol L-1 (r = 0.998) for the determination of ascorbic acid with detection limit of 6.910-5 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. |
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Repositório Institucional da UNESP |
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Voltammetric behaviour of a modified electrode with azide copper octa(3-aminopropyl)octasilsesquioxane composite in the oxidation of ascorbic acidSilsesquioxaneascorbic acidgraphite paste electrodevoltammetrymodified electrodeA 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 1.010-4 – 1.010-3 mol L-1 (r = 0.998) for the determination of ascorbic acid with detection limit of 6.910-5 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.Universidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Química Analítica, Instituto de Química de Araraquara, Araraquara, UNESP/IQ/DQA - RUA PROF. FRANCISCO DEGNI, 55, Quitandinha, CEP 14800-900, SP, BrasilUniversidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Química Analítica, Instituto de Química de Araraquara, Araraquara, UNESP/IQ/DQA - RUA PROF. FRANCISCO DEGNI, 55, Quitandinha, CEP 14800-900, SP, BrasilFaculdade de Engenharia de Ilha Solteira UNESP - Univ Estadual Paulista, Departamento de Física e Química, Av. Brasil Centro, 56 CEP 15385-000, Ilha Solteira, SP, Brazil.Universidade Estadual Paulista (Unesp)Carmo, Devaney Ribeiro do [UNESP]Paim, Leonardo Lataro [UNESP]Silvestrini, Daniela Rodrigues [UNESP]Sá, Acelino Cardoso de [UNESP]Bicalho, Urquisa de Oliveira [UNESP]Stradiotto, Nelson Ramos [UNESP]2015-05-15T13:30:23Z2015-05-15T13:30:23Z2011info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1175-1188application/pdfhttp://www.electrochemsci.org/list11.htmInternational Journal of Electrochemical Science, v. 6, p. 1175-1188, 2011.1452-3981http://hdl.handle.net/11449/123542ISSN1452-3981-2011-06-1175-1188.pdf758541818822214805450467205195364328309612941987161474569787000300721730180057123065586932979372Currículo Lattesreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengInternational Journal of Electrochemical Science1.3690,366info:eu-repo/semantics/openAccess2023-12-25T06:20:34Zoai:repositorio.unesp.br:11449/123542Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-12-25T06:20:34Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Voltammetric behaviour of a modified electrode with azide copper octa(3-aminopropyl)octasilsesquioxane composite in the oxidation of ascorbic acid |
title |
Voltammetric behaviour of a modified electrode with azide copper octa(3-aminopropyl)octasilsesquioxane composite in the oxidation of ascorbic acid |
spellingShingle |
Voltammetric behaviour of a modified electrode with azide copper octa(3-aminopropyl)octasilsesquioxane composite in the oxidation of ascorbic acid Carmo, Devaney Ribeiro do [UNESP] Silsesquioxane ascorbic acid graphite paste electrode voltammetry modified electrode |
title_short |
Voltammetric behaviour of a modified electrode with azide copper octa(3-aminopropyl)octasilsesquioxane composite in the oxidation of ascorbic acid |
title_full |
Voltammetric behaviour of a modified electrode with azide copper octa(3-aminopropyl)octasilsesquioxane composite in the oxidation of ascorbic acid |
title_fullStr |
Voltammetric behaviour of a modified electrode with azide copper octa(3-aminopropyl)octasilsesquioxane composite in the oxidation of ascorbic acid |
title_full_unstemmed |
Voltammetric behaviour of a modified electrode with azide copper octa(3-aminopropyl)octasilsesquioxane composite in the oxidation of ascorbic acid |
title_sort |
Voltammetric behaviour of a modified electrode with azide copper octa(3-aminopropyl)octasilsesquioxane composite in the oxidation of ascorbic acid |
author |
Carmo, Devaney Ribeiro do [UNESP] |
author_facet |
Carmo, Devaney Ribeiro do [UNESP] Paim, Leonardo Lataro [UNESP] Silvestrini, Daniela Rodrigues [UNESP] Sá, Acelino Cardoso de [UNESP] Bicalho, Urquisa de Oliveira [UNESP] Stradiotto, Nelson Ramos [UNESP] |
author_role |
author |
author2 |
Paim, Leonardo Lataro [UNESP] Silvestrini, Daniela Rodrigues [UNESP] Sá, Acelino Cardoso de [UNESP] Bicalho, Urquisa de Oliveira [UNESP] Stradiotto, Nelson Ramos [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Carmo, Devaney Ribeiro do [UNESP] Paim, Leonardo Lataro [UNESP] Silvestrini, Daniela Rodrigues [UNESP] Sá, Acelino Cardoso de [UNESP] Bicalho, Urquisa de Oliveira [UNESP] Stradiotto, Nelson Ramos [UNESP] |
dc.subject.por.fl_str_mv |
Silsesquioxane ascorbic acid graphite paste electrode voltammetry modified electrode |
topic |
Silsesquioxane ascorbic acid graphite paste electrode voltammetry modified electrode |
description |
A 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 1.010-4 – 1.010-3 mol L-1 (r = 0.998) for the determination of ascorbic acid with detection limit of 6.910-5 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. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011 2015-05-15T13:30:23Z 2015-05-15T13:30:23Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://www.electrochemsci.org/list11.htm International Journal of Electrochemical Science, v. 6, p. 1175-1188, 2011. 1452-3981 http://hdl.handle.net/11449/123542 ISSN1452-3981-2011-06-1175-1188.pdf 7585418188222148 0545046720519536 4328309612941987 1614745697870003 0072173018005712 3065586932979372 |
url |
http://www.electrochemsci.org/list11.htm http://hdl.handle.net/11449/123542 |
identifier_str_mv |
International Journal of Electrochemical Science, v. 6, p. 1175-1188, 2011. 1452-3981 ISSN1452-3981-2011-06-1175-1188.pdf 7585418188222148 0545046720519536 4328309612941987 1614745697870003 0072173018005712 3065586932979372 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
International Journal of Electrochemical Science 1.369 0,366 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1175-1188 application/pdf |
dc.source.none.fl_str_mv |
Currículo Lattes reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1797790104399380480 |