Simple electrochemical sensor for caffeine based on carbon and Nafion-modified carbon electrodes

Detalhes bibliográficos
Autor(a) principal: Torres, A. Carolina
Data de Publicação: 2014
Outros Autores: Barsan, Madalina M., Brett, Christopher M. A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/27131
https://doi.org/10.1016/j.foodchem.2013.10.114
Resumo: A simple, economic, highly sensitive and highly selective method for the detection of caffeine has been developed at bare and Nafion-modified glassy carbon electrodes (GCE). The electrochemical behaviour of caffeine was examined in electrolyte solutions of phosphate buffer saline, sodium perchlorate, and in choline chloride plus oxalic acid, using analytical determinations by fixed potential amperometry, phosphate buffer saline being the best. Modifications of the GCE surface with poly(3,4-ethylenedioxythiophene) (PEDOT), Nafion, and multi-walled carbon nanotubes were tested in order to evaluate possible sensor performance enhancements, Nafion giving the most satisfactory results. The effect of interfering compounds usually found in samples containing caffeine was examined at GCE without and with Nafion coating, to exclude interferences, and the sensors were successfully applied to determine the caffeine content in commercial beverages and drugs.
id RCAP_ef1121efd14a0257e6634315581f394e
oai_identifier_str oai:estudogeral.uc.pt:10316/27131
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling Simple electrochemical sensor for caffeine based on carbon and Nafion-modified carbon electrodesCaffeineGlassy carbonNafion coatingModified electrodesFood analysisA simple, economic, highly sensitive and highly selective method for the detection of caffeine has been developed at bare and Nafion-modified glassy carbon electrodes (GCE). The electrochemical behaviour of caffeine was examined in electrolyte solutions of phosphate buffer saline, sodium perchlorate, and in choline chloride plus oxalic acid, using analytical determinations by fixed potential amperometry, phosphate buffer saline being the best. Modifications of the GCE surface with poly(3,4-ethylenedioxythiophene) (PEDOT), Nafion, and multi-walled carbon nanotubes were tested in order to evaluate possible sensor performance enhancements, Nafion giving the most satisfactory results. The effect of interfering compounds usually found in samples containing caffeine was examined at GCE without and with Nafion coating, to exclude interferences, and the sensors were successfully applied to determine the caffeine content in commercial beverages and drugs.Elsevier2014-04-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/27131http://hdl.handle.net/10316/27131https://doi.org/10.1016/j.foodchem.2013.10.114engTORRES, A. Carolina; BARSAN, Madalina M.; BRETT, Christopher M. A. - Simple electrochemical sensor for caffeine based on carbon and Nafion-modified carbon electrodes. "Food Chemistry". ISSN 0308-8146. Vol. 149 (2014) p. 215-2200308-8146http://www.sciencedirect.com/science/article/pii/S030881461301563XTorres, A. CarolinaBarsan, Madalina M.Brett, Christopher M. A.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2020-05-25T13:18:34Zoai:estudogeral.uc.pt:10316/27131Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:01:50.136582Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Simple electrochemical sensor for caffeine based on carbon and Nafion-modified carbon electrodes
title Simple electrochemical sensor for caffeine based on carbon and Nafion-modified carbon electrodes
spellingShingle Simple electrochemical sensor for caffeine based on carbon and Nafion-modified carbon electrodes
Torres, A. Carolina
Caffeine
Glassy carbon
Nafion coating
Modified electrodes
Food analysis
title_short Simple electrochemical sensor for caffeine based on carbon and Nafion-modified carbon electrodes
title_full Simple electrochemical sensor for caffeine based on carbon and Nafion-modified carbon electrodes
title_fullStr Simple electrochemical sensor for caffeine based on carbon and Nafion-modified carbon electrodes
title_full_unstemmed Simple electrochemical sensor for caffeine based on carbon and Nafion-modified carbon electrodes
title_sort Simple electrochemical sensor for caffeine based on carbon and Nafion-modified carbon electrodes
author Torres, A. Carolina
author_facet Torres, A. Carolina
Barsan, Madalina M.
Brett, Christopher M. A.
author_role author
author2 Barsan, Madalina M.
Brett, Christopher M. A.
author2_role author
author
dc.contributor.author.fl_str_mv Torres, A. Carolina
Barsan, Madalina M.
Brett, Christopher M. A.
dc.subject.por.fl_str_mv Caffeine
Glassy carbon
Nafion coating
Modified electrodes
Food analysis
topic Caffeine
Glassy carbon
Nafion coating
Modified electrodes
Food analysis
description A simple, economic, highly sensitive and highly selective method for the detection of caffeine has been developed at bare and Nafion-modified glassy carbon electrodes (GCE). The electrochemical behaviour of caffeine was examined in electrolyte solutions of phosphate buffer saline, sodium perchlorate, and in choline chloride plus oxalic acid, using analytical determinations by fixed potential amperometry, phosphate buffer saline being the best. Modifications of the GCE surface with poly(3,4-ethylenedioxythiophene) (PEDOT), Nafion, and multi-walled carbon nanotubes were tested in order to evaluate possible sensor performance enhancements, Nafion giving the most satisfactory results. The effect of interfering compounds usually found in samples containing caffeine was examined at GCE without and with Nafion coating, to exclude interferences, and the sensors were successfully applied to determine the caffeine content in commercial beverages and drugs.
publishDate 2014
dc.date.none.fl_str_mv 2014-04-15
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://hdl.handle.net/10316/27131
http://hdl.handle.net/10316/27131
https://doi.org/10.1016/j.foodchem.2013.10.114
url http://hdl.handle.net/10316/27131
https://doi.org/10.1016/j.foodchem.2013.10.114
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv TORRES, A. Carolina; BARSAN, Madalina M.; BRETT, Christopher M. A. - Simple electrochemical sensor for caffeine based on carbon and Nafion-modified carbon electrodes. "Food Chemistry". ISSN 0308-8146. Vol. 149 (2014) p. 215-220
0308-8146
http://www.sciencedirect.com/science/article/pii/S030881461301563X
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
_version_ 1799133908833402880

Registros relacionados