Aronia melanocarpa phenolics and their antioxidant activity
The purpose of the present study was to evaluate small and high molecular phenolics (tannins) and antioxidant activity of Aronia melanocarpa berries, juice and pomace in order to find new potential sources of natural antioxidants. The fruits of Aronia melanocarpa Elliot were collected in the middle of October at a plantation near Wroclaw, Poland. The pomace has a much higher content of phenolics in comparision to juice and fruits. Results showed that polymeric proanthocyanins, predominantly of (−)epicatechin, are the major class of polyphenolic compounds in chokeberry, represent 66% of fruits polyphenols. The average concentration ranged from 1578.79 mg/100 g of DW for chokeberry juice up to 8191.58 mg/100 g in pomace. The concentration of phenolic acids (chlorogenic and neochlorogenic acids) in juice was higher than in pomace. Anthocyanins in Aronia melanocarpa are second phenolic compound group and represent about 25% of total polyphenols, mixture of four different cyanidin glycosides: 3-galactoside, 3-glucoside, 3-arabinoside and 3-xyloside. The higher antioxidant activity expressed as TEAC was measured in pomace >fruit >juice.
KeywordsAronia melanocarpa Phenolic acids Tannin Anthocyanin glycosides Antioxidant
This work was supported by the State Committee for Scientific Research of Poland (KBN) under grant PBZ-KBN-94/P06/2003/24.
- 1.Ramarathnam N, Ochi H, Takeuchi M (1997) Antioxidant defense system in vegetable extracts. In natural antioxidants: chemistry. health effects. and applications. Shahidi F. AOCS Press: Champaign. IL, pp 76–87Google Scholar
- 2.Macheix JJ, Fleuriet A, Billot J (1990) Fruit Phenolics. CRC Press: Boca Raton, FLGoogle Scholar
- 5.Knekt P, Jarvinen R, Reunanen A, Maatela J (1996) Br Med J 312:478–481Google Scholar
- 6.Loliger J (1991) The use of antioxidants in food. In: Aruoma OI, Halliwell B (eds) Free Radicals and Food Additives. Taylor and Francis, London, pp 129–150Google Scholar
- 7.Rice-Evans CA, Miller NJ, Bolwell PG, Bramley PM, Pridham JB (1995) Free Radical Res 22:375–383Google Scholar
- 17.Strigl AW, Leitner E, Pfannhauser W (1995) Zeit Lebens Unters Forsch 91:177–180Google Scholar
- 19.Oszmiański J, Sapis JC (1989) Zesz Nauk AR Wrocław Techn Żywn V 184:75–87Google Scholar
- 22.Oszmiański J, Kucharska A (1995) Zesz Nauk AR Wrocław Techn Żywn VIII 273:75–87Google Scholar