Electrochemical Evaluations of Glutamate at a Gold Electrode
Autor(a) principal: | |
---|---|
Data de Publicação: | 2007 |
Outros Autores: | , , , , |
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 %. |
id |
RCAP_0b25ee42e493a1f84af4e322755d5089 |
---|---|
oai_identifier_str |
oai:scielo:S0872-19042007000100015 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
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 |
|
_version_ |
1799137289470738432 |