Polyphenol content and total antioxidant activity of vini novelli (young red wines)

J Agric Food Chem. 2000 Mar;48(3):732-5. doi: 10.1021/jf990251v.

Abstract

Eight commercial Italian vini novelli (red wines prepared by carbonic maceration and supposed to be consumed within three months from their wine-making) were evaluated for their total antioxidant activity. The wines had an average total phenol content (1605.4 +/- 337.4 mg/L gallic acid equivalents) lower than that of wines prepared by traditional maceration and consumable after aging (2057. 3 +/- 524.0 mg/L gallic acid equivalents). The average flavanol content (424.7 +/- 121.3 mg/L catechin equivalents) and the total antioxidant activity (16.8 +/- 3.8 mmol/L Trolox equivalents) of vini novelli were higher than the corresponding values (382.7 +/- 174.5 mg/L catechin equivalents and 12.3 +/- 3.3 mmol/L Trolox equivalents) found for aged wines. Three couples of experimental wines were prepared from the same grapes by traditional or carbonic maceration. These wines showed a different phenolic pattern, anthocyanins being more abundant in vini novelli. However, the average total antioxidant activities of the wines were similar, suggesting that aging (and not the wine-making technique) is the main factor influencing the antioxidant activity of red wines.

MeSH terms

  • Antioxidants / analysis*
  • Flavonoids / analysis*
  • Flavonols
  • Humans
  • Phenols / analysis*
  • Polymers / analysis*
  • Wine / analysis*

Substances

  • Antioxidants
  • Flavonoids
  • Flavonols
  • Phenols
  • Polymers