| dc.description.abstract | Malbec is a wine grape variety that is now mainly produced in Mendoza and considered to be the
emblematic cultivar of Argentina. Forty-four phenolic compounds, including hydroxybenzoic and
hydroxycinnamic acids and different flavonoids, were identified and quantified in 61 monovarietal
Malbec wines from 11 geographical zones of Mendoza province, using a reversed phase highperformance
liquid chromatography system coupled to a diode array detector (HPLC-DAD). Among
non-flavonoids, gallic, cis-caftaric, trans-coutaric, and caffeic acids presented the higher concentrations
in all of the samples, whereas trans-resveratrol glucoside was present at concentrations from
0.6 to 1.3 mg/L. For the flavonoids, (þ)-catechin and (-)-epicatechin presented the higher
concentrations among flavan-3-ols with a ratio (þ)-catechin/(-)-epicatechin from 1.3 to 2.1. An
astilbin derivative and quercetin presented the higher concentrations for flavonols, whereas
malvidin-3-glucoside and its derivatives were the major anthocyanins. For the first time the phenolic
composition of Malbec wines from Mendoza province has been characterized. | |
