Antioxidant activity and polyphenol profile of Vranac red wines from Balkan region

Abstract

The objective of the present study was to investigate the correlation between the radical-scavenging properties (measured by evaluating the quenching of the stable 2,2-diphenyl-1-picrylhydrazil radical) of Serbian, Macedonian and Montenegran red wine Vranac of different geographical origins, and their contents of total phenolics, total flavonoids and polyphenol profile. All tested Vranac wines samples showed a high antioxidant activity ranging from 13.00 to 15.02 mmol/L, while the total polyphenolic content was between 3478.70 and 3935.19 mg/L. The predominant anthocyanin was malvidin-3-glucoside (179.04-281.31 mg/L), predominant flavonol was quercetin-3-glucoronide (5.88-11.78 mg/L), predominant flavan-3-ol was catechin (24.43 - 76.78 mg/L) and predominant hydroxicinnamic acid was t-caftaric acid (13.46-38.56 mg/L). Generally, red wines Vranac produced from Balkan regions are a rich source of phenolics, which the evident antioxidant capacity showed.