Antioxidant activity and total phenol content of white wine Žilavka

Abstract

Wine contains compounds with strong antioxidant activity, primarily phenol compounds in flavonoids and nonflavonoids groups. This study determined total phenol concentration and antioxidant activity in eighteen Herzegovinian white wines from Žilavka grapes (2011 vintage). Total phenol content used Folin-Ciocalteu spectrophotometric method with gallic acid standard. Two methods assessed antioxidant activity: DPPH free radical scavenging and Briggs-Rauscher oscillating reaction. Total phenol concentration in wine samples varied from 249.3 ±SD mgL⁻¹ to 801. ±SD mgL⁻¹. DPPH method showed antioxidant capacity ranging 28.8%±SD to 70.2%±SD. Results confirmed wines with higher total phenol content exhibited stronger antioxidant activity.