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Oxidation management of white wines using cyclic voltammetry and multivariate process monitoring

2008Journal article Restricted access
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dc.contributor.authorMartins, Rui C.
dc.contributor.authorOliveira, Raquel
dc.contributor.authorBento, Fatima
dc.contributor.authorGeraldo, Dulce
dc.contributor.authorLopes, Vitor V.
dc.contributor.authorPinho, Paula Guedes de
dc.contributor.authorOliveira, Carla M.
dc.contributor.authorFerreira, António C. Silva
dc.date.accessioned2010-10-11T15:51:14Z
dc.date.available2010-10-11T15:51:14Z
dc.date.issued2008
dc.description.abstractThe development of a fingerprinting strategy capable to evaluate the “oxidation status” of white wines based on cyclic voltammetry is proposed here. It is known that the levels of specific antioxidants and redox mechanisms may be evaluated by cyclic voltammetry. This electrochemical technique was applied on two sets of samples. One group was composed of normal aged white wines and a second group obtained from a white wine forced aging protocol with different oxygen, SO2, pH, and temperature regimens. A study of antioxidant additions, namely ascorbic acid, was also made in order to establish a statistical link between voltammogram fingerprints and chemical antioxidant substances. It was observed that the oxidation curve presented typical features, which enables sample discrimination according to age, oxygen consumption, and antioxidant additions. In fact, it was possible to place the results into four significant orthogonal directions, compressing 99.8% of nonrandom features. Attempts were made to make voltammogram fingerprinting a tool for monitoring oxidation management. For this purpose, a supervised multivariate control chart was developed using a control sample as reference. When white wines are plotted onto the chart, it is possible to monitor the oxidation status and to diagnose the effects of oxygen regimes and antioxidant activity. Finally, quantification of substances implicated in the oxidation process as reagents (antioxidants) and products (off-flavors)was tried using a supervised algorithmic the partial least square regression analysis. Good correlations (r > 0.93) were observed for ascorbic acid, Folin-Ciocalteu index, total SO2, methional, and phenylacetaldehyde. These results show that cyclic voltammetry fingerprinting can be used to monitor and diagnose the effects of wine oxidation.por
dc.identifier.citation"Journal of Agricultural and Food Chemistry". ISSN 0021-8561. 56: 24 (2008) 12092–12098por
dc.identifier.doi10.1021/jf8021628
dc.identifier.urihttp://hdl.handle.net/10400.14/2802
dc.language.isoengpor
dc.publisherAmerican Chemical Societypor
dc.subjectWhite winepor
dc.subjectAntioxidantspor
dc.subjectCyclic voltammetrypor
dc.subjectMultivariate processpor
dc.titleOxidation management of white wines using cyclic voltammetry and multivariate process monitoringpor
dc.typejournal article
dspace.entity.typePublication
person.familyNameMartins
person.familyNameGuedes de Pinho
person.familyNameOliveira
person.familyNameSilva Ferreira
person.givenNameRui
person.givenNamePaula
person.givenNameCarla
person.givenNameAntonio Cesar
person.identifier1906102
person.identifier392870
person.identifier.ciencia-id8B14-390C-8931
person.identifier.ciencia-id2510-1418-EF48
person.identifier.ciencia-id521E-EE5E-AF0B
person.identifier.ciencia-id931A-48DA-23A8
person.identifier.orcid0000-0001-9058-3147
person.identifier.orcid0000-0002-7395-5700
person.identifier.orcid0000-0002-3346-2629
person.identifier.orcid0000-0002-1188-1021
person.identifier.scopus-author-id6504448214
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication45e96a98-4b2c-4b79-99b1-6d12c82d4f4f
relation.isAuthorOfPublication0bde318f-79f7-4130-8600-e553f3384cc6
relation.isAuthorOfPublication412b11af-3f1b-4364-888b-b5d87863a40f
relation.isAuthorOfPublication826c11dd-d070-4b67-ac58-c96675e3f3b8
relation.isAuthorOfPublication.latestForDiscovery826c11dd-d070-4b67-ac58-c96675e3f3b8

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