Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/73090
Registo completo
Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | Rocha, Pedro | por |
dc.contributor.author | Vilas-Boas, Angela | por |
dc.contributor.author | Fontes, Natacha | por |
dc.contributor.author | Geraldo, Dulce | por |
dc.contributor.author | Bento, M. Fátima | por |
dc.date.accessioned | 2021-05-29T15:39:19Z | - |
dc.date.available | 2022-01-01T07:00:43Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | Rocha, P., Vilas-Boas, Â., Fontes, N., Geraldo, D., & Bento, F. (2020). Evaluation of Polyphenols in Wine by Voltammetric Techniques with Screen Printed Carbon Electrodes. [https://doi.org/10.1002/elan.201900392]. Electroanalysis, 32(1), 159-165. doi: https://doi.org/10.1002/elan.201900392 | por |
dc.identifier.issn | 1040-0397 | por |
dc.identifier.uri | https://hdl.handle.net/1822/73090 | - |
dc.description.abstract | The electrochemical oxidation processes that occur during a voltammetric assay in wine samples lead to the formation of species that obstructs the surface and reduce their active area. This effect is critical for screen printed carbon electrodes (SPCE) and leads to abnormal low values of the total polyphenols content of wines, ca. 72 % lower than those obtained with glassy carbon electrodes. This effect was examined using 10 red and Port wine samples. Mechanical polishing and electrochemical-based treatments for the removal of this fouling layer were tested. The best results were obtained by electrochemical activation in at a constant potential of 1.2 V during 100 s Na2CO3 saturated solution, and by polishing. The success of some of these treatments brings an added value to SPCE, as it opens the possibility of their reuse in the wine analysis. This outcome is particularly relevant for quality control where a huge number of analysis is performed and the reduction of cost may dictates the choice of the analytical method. | por |
dc.description.sponsorship | This work received financial support from the Foundation for Science and Technology (FCT, Portugal), through projects UID/QUI/00686/2016 and UID/QUI/00686/2019 (CQUM). | por |
dc.language.iso | eng | por |
dc.publisher | Wiley | por |
dc.relation | UID/QUI/00686/2016 | por |
dc.relation | info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FQUI%2F00686%2F2019/PT | por |
dc.rights | openAccess | por |
dc.subject | SPCE | por |
dc.subject | Electrode cleaning and activation | por |
dc.subject | Polyphenols | por |
dc.subject | Food analysis | por |
dc.subject | DPV | por |
dc.title | Evaluation of polyphenols in wine by voltammetric techniques with screen printed carbon electrodes | por |
dc.type | article | - |
dc.peerreviewed | yes | por |
dc.relation.publisherversion | https://analyticalsciencejournals.onlinelibrary.wiley.com/doi/full/10.1002/elan.201900392 | por |
oaire.citationStartPage | 159 | por |
oaire.citationEndPage | 165 | por |
oaire.citationIssue | 1 | por |
oaire.citationVolume | 32 | por |
dc.date.updated | 2021-05-28T09:32:43Z | - |
dc.identifier.eissn | 1521-4109 | por |
dc.identifier.doi | 10.1002/elan.201900392 | por |
dc.subject.fos | Ciências Naturais::Ciências Químicas | por |
dc.subject.wos | Science & Technology | - |
sdum.export.identifier | 10902 | - |
sdum.journal | Electroanalysis | por |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
Manuscript.pdf | 480,59 kB | Adobe PDF | Ver/Abrir |