Electrochemical Evaluations of Glutamate at a Gold Electrode

Detalhes bibliográficos
Autor(a) principal: Sales,M. Goreti F.
Data de Publicação: 2007
Outros Autores: Martins,Cláudia, Barroso,M. Fátima, Vaz,M. Carmo V.F., Oliveira,M. Beatriz P., Delerue-Matos,C.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042007000100015
Resumo: The voltammetric behaviour of glutamate at a gold electrode was studied by means of cyclic voltammetry. From 2.6 to 11.5 pH values, glutamate originated a single cathodic peak. Potential of the peak, Ep, was -0.8 V, and it was independent from pH. The reduction of glutamate was found irreversible and mainly controlled by diffusion. An analytical approach for analysis of glutamate by means of square wave voltammetry was developed. Plots of current versus concentration presented a linear behaviour from 2.5×10-4 to 2.7×10-3 M. The detection limit was 6.3×10-5 M. Interference from compounds co-existing with glutamate in food was negligible, and in favour of an application of the proposed method to the analysis of real samples. Determination of glutamate in pure solutions resulted in acceptable deviation from the stated concentration. Relative errors ranged -2.5 to +1.6 %.
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spelling Electrochemical Evaluations of Glutamate at a Gold Electrodeglutamategold electrodevoltammetryflavour enhancerfoodThe voltammetric behaviour of glutamate at a gold electrode was studied by means of cyclic voltammetry. From 2.6 to 11.5 pH values, glutamate originated a single cathodic peak. Potential of the peak, Ep, was -0.8 V, and it was independent from pH. The reduction of glutamate was found irreversible and mainly controlled by diffusion. An analytical approach for analysis of glutamate by means of square wave voltammetry was developed. Plots of current versus concentration presented a linear behaviour from 2.5×10-4 to 2.7×10-3 M. The detection limit was 6.3×10-5 M. Interference from compounds co-existing with glutamate in food was negligible, and in favour of an application of the proposed method to the analysis of real samples. Determination of glutamate in pure solutions resulted in acceptable deviation from the stated concentration. Relative errors ranged -2.5 to +1.6 %.Sociedade Portuguesa de Electroquímica2007-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articletext/htmlhttp://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042007000100015Portugaliae Electrochimica Acta v.25 n.1 2007reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAPenghttp://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042007000100015Sales,M. Goreti F.Martins,CláudiaBarroso,M. FátimaVaz,M. Carmo V.F.Oliveira,M. Beatriz P.Delerue-Matos,C.info:eu-repo/semantics/openAccess2024-02-06T17:06:51Zoai:scielo:S0872-19042007000100015Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:20:02.258918Repositório 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 Electrochemical Evaluations of Glutamate at a Gold Electrode
title Electrochemical Evaluations of Glutamate at a Gold Electrode
spellingShingle Electrochemical Evaluations of Glutamate at a Gold Electrode
Sales,M. Goreti F.
glutamate
gold electrode
voltammetry
flavour enhancer
food
title_short Electrochemical Evaluations of Glutamate at a Gold Electrode
title_full Electrochemical Evaluations of Glutamate at a Gold Electrode
title_fullStr Electrochemical Evaluations of Glutamate at a Gold Electrode
title_full_unstemmed Electrochemical Evaluations of Glutamate at a Gold Electrode
title_sort Electrochemical Evaluations of Glutamate at a Gold Electrode
author Sales,M. Goreti F.
author_facet Sales,M. Goreti F.
Martins,Cláudia
Barroso,M. Fátima
Vaz,M. Carmo V.F.
Oliveira,M. Beatriz P.
Delerue-Matos,C.
author_role author
author2 Martins,Cláudia
Barroso,M. Fátima
Vaz,M. Carmo V.F.
Oliveira,M. Beatriz P.
Delerue-Matos,C.
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Sales,M. Goreti F.
Martins,Cláudia
Barroso,M. Fátima
Vaz,M. Carmo V.F.
Oliveira,M. Beatriz P.
Delerue-Matos,C.
dc.subject.por.fl_str_mv glutamate
gold electrode
voltammetry
flavour enhancer
food
topic glutamate
gold electrode
voltammetry
flavour enhancer
food
description The voltammetric behaviour of glutamate at a gold electrode was studied by means of cyclic voltammetry. From 2.6 to 11.5 pH values, glutamate originated a single cathodic peak. Potential of the peak, Ep, was -0.8 V, and it was independent from pH. The reduction of glutamate was found irreversible and mainly controlled by diffusion. An analytical approach for analysis of glutamate by means of square wave voltammetry was developed. Plots of current versus concentration presented a linear behaviour from 2.5×10-4 to 2.7×10-3 M. The detection limit was 6.3×10-5 M. Interference from compounds co-existing with glutamate in food was negligible, and in favour of an application of the proposed method to the analysis of real samples. Determination of glutamate in pure solutions resulted in acceptable deviation from the stated concentration. Relative errors ranged -2.5 to +1.6 %.
publishDate 2007
dc.date.none.fl_str_mv 2007-01-01
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://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042007000100015
url http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042007000100015
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042007000100015
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Portuguesa de Electroquímica
publisher.none.fl_str_mv Sociedade Portuguesa de Electroquímica
dc.source.none.fl_str_mv Portugaliae Electrochimica Acta v.25 n.1 2007
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
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