Preliminary study of resveratrol content in Aragon red and rose wines

A survey of resveratrol content in wines of the four Aragon designations of origin (Borja, Carifiena, Calatayud and Somontano) was carried out. Concentrations of trans- and cis-resveratrol isomers of 98 commercial wines of the four designations of origin, from several vintages, were analyzed by means of reverse-phase high-performance liquid chromatography. Concentration of trans-resveratrol ranged from 0.32 to 4.44 mg/l in red wines and from 0.12 to 2.80 mg/l in rose wines. cis-Resveratrot levels ranged from 0.20 to 5.84 mg/l in red wines and from 0.02 to 3.17 mg/l in rose wines. The grape variety influenced resveratrol contents in wines from the different regions. The highest translcis ratios were found in Somontano (4.50) and Calatayud wines (2.90), both of the Tempranillo variety. However, a discriminant analysis applied to the concentrations did not show significant differences between young red wines nor between rose wines of the four designations of origin. © 2004 Elsevier Ltd. All rights reserved.