Publication
Analyse du cis- et trans-resveratrol dans les vins produits au portugal
| dc.contributor.author | Revel, G. de | |
| dc.contributor.author | Hogg, T. | |
| dc.contributor.author | Santos, Cristina | |
| dc.date.accessioned | 2011-10-14T15:05:27Z | |
| dc.date.available | 2011-10-14T15:05:27Z | |
| dc.date.issued | 1996 | |
| dc.description.abstract | Nous mettons au point une méthode d'analyse du resveratrol (trallS-3,5,4'-trihydroxystilbene) à I'aide de Ia chromatographie en phase gazeuse et détection par ionisation de tlamme (FID), apres une extraction du vin par I'éther et sylilation par I'hexaméthyldisilazane (HMDS). Le seuil de détection est de 5 IIgII.Une séparation parfaite des différents isom"res tralls et eis du resveratrol est obtenue et permet leur détermination dans tous les vins étudiés. Ainsi nous montrons que I'isomere eis est toujours présent dans le vin et peut atteindre de 30 à 70 p. cent du resveratrol total. Nous présentons ici une premiere étude sur la composition en resveratrol des vins provenant de différentes régions du Portugal. Les vins analysés présentent des teneurs en isomeres trans de l'ordre de 120 à 500 Ilglldans les vins blancs, et de 400 à 4500 IIgIIdans les vins rouges. Une étude plus particuliere du Vinho Verde (vin du Nord dUPortugal) a été effectuée. | por |
| dc.description.abstract | Trans-resveratrol (trans-3,5,4'-trihydroxystilbene) has been reported as contributing to the health promoting properties of wine. In this study wines made exclusively from native Portuguese varieties were assayed for the levels of trans-resveratrol. The method developed uses GC-FID and GC-MS determinations of TMS derivatives; derivatisation by hexamethyldisilazane following ether extraction of wines. Two currently used food antioxydants nordihydroguaiaretic acid (NDGA) and 2' ,4' ,5' -trihydroxybutyrophenone (THBP), were employed as internai standards, being extracted and derivatised in exactly the same way as the determined resveratrol. These internal standards permitted the verification of a good linearity and reproducibility for this determination, with a detection limit of 5 μg/l. A characteristic of this method is the enhanced discrimination between cis- and trans- isomers of resveratrol with the consequent possibility of the determination of cis-resveratrol. The levels of resveratrol from wines of different regions of Portugal was studied. There appeared to be considerable variation in the concentrations encountered in the various wines although generally red wines contained much higher levels than white wines. The use of glucosidase enzymes in winemaking led to an increase of 3 - to 4 - fold in the levels of resveratrol encountered in Vinho Verde wines. Differences were noted between the resveratrol levels of specifie varietal wines from the Vinho Verde. | |
| dc.identifier.citation | REVEL, G. de ; HOGG, T. ; SANTOS, Cristina - Analyse du cis- et trans-resveratrol dans les vins produits au portugal. Journal International des Sciences de la Vigne et du Vin. ISSN 1151-0285. 30:1 (1996) 31-37 | por |
| dc.identifier.doi | 10.20870/oeno-one.1996.30.1.1116 | |
| dc.identifier.uri | http://hdl.handle.net/10400.14/6098 | |
| dc.language.iso | fra | por |
| dc.peerreviewed | yes | por |
| dc.publisher | Vigne et Vin Publications Internationales | por |
| dc.subject | Resveratrol | por |
| dc.subject | Vin | por |
| dc.subject | Analyse chromatographique | por |
| dc.title | Analyse du cis- et trans-resveratrol dans les vins produits au portugal | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| person.familyName | Hogg | |
| person.givenName | Tim | |
| person.identifier.ciencia-id | FF11-88CC-8BD4 | |
| person.identifier.orcid | 0000-0003-2017-4131 | |
| person.identifier.rid | JXY-0365-2024 | |
| person.identifier.scopus-author-id | 7005603860 | |
| rcaap.rights | openAccess | por |
| rcaap.type | article | por |
| relation.isAuthorOfPublication | 12b8092d-fe59-408b-8058-47369a97d229 | |
| relation.isAuthorOfPublication.latestForDiscovery | 12b8092d-fe59-408b-8058-47369a97d229 |