A new, improved sensor for ascorbate determination at copper hexacyanoferrate modified carbon film electrodes

Detalhes bibliográficos
Autor(a) principal: Pauliukaite, Rasa
Data de Publicação: 2005
Outros Autores: Ghica, Mariana Emilia, 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/10316/7793
https://doi.org/10.1007/s00216-004-2958-6
Resumo: A new, improved sensor for the electrocatalytic determination of ascorbate has been developed that has both a low applied operating potential and a low detection limit. The sensor was constructed by depositing copper hexacyanoferrate film either electrochemically or chemically onto carbon film electrode, and it was then characterised by cyclic voltammetry and electrochemical impedance spectroscopy. Chemically deposited films were shown to be the best for ascorbate determination and were used as an amperometric sensor at +0.05 V versus SCE to determine ascorbate in wines and juice. The linear range extended to 5 mM with a limit of detection of 2.1 µM, the sensor was stable for more than four months, and it could be used continuously for at least 20 days.
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spelling A new, improved sensor for ascorbate determination at copper hexacyanoferrate modified carbon film electrodesA new, improved sensor for the electrocatalytic determination of ascorbate has been developed that has both a low applied operating potential and a low detection limit. The sensor was constructed by depositing copper hexacyanoferrate film either electrochemically or chemically onto carbon film electrode, and it was then characterised by cyclic voltammetry and electrochemical impedance spectroscopy. Chemically deposited films were shown to be the best for ascorbate determination and were used as an amperometric sensor at +0.05 V versus SCE to determine ascorbate in wines and juice. The linear range extended to 5 mM with a limit of detection of 2.1 µM, the sensor was stable for more than four months, and it could be used continuously for at least 20 days.2005info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/7793http://hdl.handle.net/10316/7793https://doi.org/10.1007/s00216-004-2958-6engAnalytical and Bioanalytical Chemistry. 381:4 (2005) 972-978Pauliukaite, RasaGhica, Mariana EmiliaBrett, 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:RCAAP2020-05-25T13:15:11Zoai:estudogeral.uc.pt:10316/7793Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:01:27.888718Repositório 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 A new, improved sensor for ascorbate determination at copper hexacyanoferrate modified carbon film electrodes
title A new, improved sensor for ascorbate determination at copper hexacyanoferrate modified carbon film electrodes
spellingShingle A new, improved sensor for ascorbate determination at copper hexacyanoferrate modified carbon film electrodes
Pauliukaite, Rasa
title_short A new, improved sensor for ascorbate determination at copper hexacyanoferrate modified carbon film electrodes
title_full A new, improved sensor for ascorbate determination at copper hexacyanoferrate modified carbon film electrodes
title_fullStr A new, improved sensor for ascorbate determination at copper hexacyanoferrate modified carbon film electrodes
title_full_unstemmed A new, improved sensor for ascorbate determination at copper hexacyanoferrate modified carbon film electrodes
title_sort A new, improved sensor for ascorbate determination at copper hexacyanoferrate modified carbon film electrodes
author Pauliukaite, Rasa
author_facet Pauliukaite, Rasa
Ghica, Mariana Emilia
Brett, Christopher M. A.
author_role author
author2 Ghica, Mariana Emilia
Brett, Christopher M. A.
author2_role author
author
dc.contributor.author.fl_str_mv Pauliukaite, Rasa
Ghica, Mariana Emilia
Brett, Christopher M. A.
description A new, improved sensor for the electrocatalytic determination of ascorbate has been developed that has both a low applied operating potential and a low detection limit. The sensor was constructed by depositing copper hexacyanoferrate film either electrochemically or chemically onto carbon film electrode, and it was then characterised by cyclic voltammetry and electrochemical impedance spectroscopy. Chemically deposited films were shown to be the best for ascorbate determination and were used as an amperometric sensor at +0.05 V versus SCE to determine ascorbate in wines and juice. The linear range extended to 5 mM with a limit of detection of 2.1 µM, the sensor was stable for more than four months, and it could be used continuously for at least 20 days.
publishDate 2005
dc.date.none.fl_str_mv 2005
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/10316/7793
http://hdl.handle.net/10316/7793
https://doi.org/10.1007/s00216-004-2958-6
url http://hdl.handle.net/10316/7793
https://doi.org/10.1007/s00216-004-2958-6
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Analytical and Bioanalytical Chemistry. 381:4 (2005) 972-978
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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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
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