title: Free radical scavenging activity and anthocyanin profile of Cabernet Sauvignon wines from the Balkan region.
abstract: The present study is focused on anthocyanin derivatives characterizing the antioxidant activity of Cabernet Sauvignon wines produced from different vineyard regions in the Balkans. These bioactive compounds were quantified with a high performance liquid chromatography (HPLC)-diode array detection (DAD) method. The antiradical activity was estimated by the ability of the wine to scavenge the stable 2,2;-diphenyl-1-picrylhydrazyl free radical (DPPH(*)). The results show that the total anthocyanin content varied from 205.88 to 1940.28 mg/L, depending on agroclimatic factors and the enological practices of the corresponding vineyard region. The most prominent antocyanin in all investigated Cabernet Sauvignon wines was malvidin-3-O-monoglucoside, which accounted for 50.57% of total content, followed by its acetyl derivatives, 15.45%, and p-coumaryl derivatives 5.66%. The relationship between the anthocyanin derivatives and free radical scavenging activity is discussed. A high correlation between total anthocyanin content and DPPH scavenging ability of tested wines was confirmed (r(2) = 0.9619). The significant correlations were obtained between antiradical activity and the sum of 3-monoglucoside (r(2) = 0.95594), the sum of 3-acetyl-3-glucoside (r(2) = 0.9728) and the sum of p-coumaryl-3-glucoside (r(2) = 0.8873) of wine samples. It can be concluded that, the anthocyanin composition can be used as biochemical marker for the authenticity of red grape cultivar and their corresponding single-cultivar wine.
authors.affiliation: Department of Chemistry, Faculty of Science and Mathematics, University of Nis, Visegradska 33, P.O.Box 224, 18000 Nis, Serbia. blaga_radovanovic@yahoo.co.uk
authors.forename: Blaga
authors.initials: B
authors.lastname: Radovanović
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Radovanović
mesh_terms: D000872:Anthocyanins / Q000737:chemistry*; D001713:Biphenyl Compounds / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid; D016166:Free Radical Scavengers / Q000737:chemistry*; D010851:Picrates / Q000737:chemistry; D014920:Wine / Q000032:analysis*
chemical_list: D000872:Anthocyanins; D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D010851:Picrates; C004931:1,1-diphenyl-2-picrylhydrazyl