Publicação
Electrochemical Evaluations of Glutamate at a Gold Electrode
| 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 %. |
|---|---|
| Autores principais: | Sales,M. Goreti F. |
| Outros Autores: | Martins,Cláudia; Barroso,M. Fátima; Vaz,M. Carmo V.F.; Oliveira,M. Beatriz P.; Delerue-Matos,C. |
| Assunto: | glutamate gold electrode voltammetry flavour enhancer food |
| Ano: | 2007 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Fundação para a Ciência e Tecnologia |
| Idioma: | inglês |
| Origem: | SciELO Portugal |
| _version_ | 1868441710747451392 |
|---|---|
| author | Sales,M. Goreti F. |
| 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 |
| 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 |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Sales,M. Goreti F.\"},{\"Person.name\":\"Martins,Cláudia\"},{\"Person.name\":\"Barroso,M. Fátima\"},{\"Person.name\":\"Vaz,M. Carmo V.F.\"},{\"Person.name\":\"Oliveira,M. Beatriz P.\"},{\"Person.name\":\"Delerue-Matos,C.\"}] |
| datacite.creators.creator.creatorName.fl_str_mv | Sales,M. Goreti F. Martins,Cláudia Barroso,M. Fátima Vaz,M. Carmo V.F. Oliveira,M. Beatriz P. Delerue-Matos,C. |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | glutamate gold electrode voltammetry flavour enhancer food |
| datacite.titles.title.fl_str_mv | Electrochemical Evaluations of Glutamate at a Gold Electrode |
| dc.creator.none.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.format.none.fl_str_mv | text/html |
| dc.identifier.none.fl_str_mv | http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042007000100015 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | Sociedade Portuguesa de Electroquímica |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.source.none.fl_str_mv | Portugaliae Electrochimica Acta v.25 n.1 2007 |
| dc.subject.none.fl_str_mv | glutamate gold electrode voltammetry flavour enhancer food |
| dc.title.fl_str_mv | Electrochemical Evaluations of Glutamate at a Gold Electrode |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| 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 %. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | article |
| id | scielopt_0b25ee42e493a1f84af4e322755d5089 |
| identifier.url.fl_str_mv | http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042007000100015 |
| instacron_str | SciELO |
| institution | Fundação para a Ciência e Tecnologia |
| instname_str | Fundação para a Ciência e Tecnologia |
| language | eng |
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| network_name_str | SciELO Portugal |
| oai_identifier_str | oai:scielo:S0872-19042007000100015 |
| organization_str_mv | urn:organizationAcronym:scielo |
| person_str_mv | Sales,M. Goreti F. Martins,Cláudia Barroso,M. Fátima Vaz,M. Carmo V.F. Oliveira,M. Beatriz P. Delerue-Matos,C. |
| publishDate | 2007 |
| publisher.none.fl_str_mv | Sociedade Portuguesa de Electroquímica |
| reponame_str | SciELO Portugal |
| repository_id_str | urn:repositoryAcronym:scielopt |
| service_str_mv | urn:repositoryAcronym:scielopt |
| spelling | Electrochemical Evaluations of Glutamate at a Gold ElectrodeSales,M. Goreti F.Martins,CláudiaBarroso,M. FátimaVaz,M. Carmo V.F.Oliveira,M. Beatriz P.Delerue-Matos,C.glutamategold electrodevoltammetryflavour enhancerfoodopen accesshttp://purl.org/coar/access_right/c_abf2http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042007000100015URLhttp://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042007000100015URLHasVersion2007-01-01The 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 ElectroquímicaPortugaliae Electrochimica Acta v.25 n.1 2007text/htmlengjournal articlehttp://purl.org/coar/resource_type/c_6501literature |
| spellingShingle | Electrochemical Evaluations of Glutamate at a Gold Electrode Sales,M. Goreti F. glutamate gold electrode voltammetry flavour enhancer food |
| status | SINGLETON |
| subject.fl_str_mv | glutamate gold electrode voltammetry flavour enhancer food |
| title | 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_short | Electrochemical Evaluations of Glutamate at a Gold Electrode |
| title_sort | Electrochemical Evaluations of Glutamate at a Gold Electrode |
| topic | glutamate gold electrode voltammetry flavour enhancer food |
| topic_facet | glutamate gold electrode voltammetry flavour enhancer food |
| url | http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042007000100015 |
| visible | 1 |