Changes in phenolic antioxidants during chuno production (traditional Andean freeze and sun-dried potato)
Författare
Summary, in English
Total antioxidant capacity (TAC), total phenolic compounds (TPH), total flavonoids (TF) and the amounts of individual phenolic compounds were assessed in Bolivian potato cultivars (various Solanum species) before, during and after the traditional freezing and sun-drying of potatoes known as chunos. The TAC of chunos ranged from 0.4 to 2.7 mu mol Trolox equivalents/g dry matter using 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) (ABTS) and from 0.7 to 3.0 according to the ferric reduction antioxidant power (FRAP). The values of TAC obtained using FRAP were about 70% lower after freeze-drying while they remained essentially constant when measured using ABTS. High-performance liquid chromatography showed the presence of epicatechin, chlorogenic acid, gallic acid, syringaldehyde and protocatechuic acid in both potato and chuno samples although the values were lower in the churl samples. The results suggest that the antioxidant capacity and the content of individual phenolics are somewhat decreased but far from eliminated during the process. Chuno can therefore still be considered an important source of antioxidants in the diet. (C) 2010 Elsevier Inc. All rights reserved.
Avdelning/ar
- Department of Food Technology, Engineering and Nutrition
- Tillämpad biokemi
Publiceringsår
2011
Språk
Engelska
Sidor
580-587
Publikation/Tidskrift/Serie
Journal of Food Composition and Analysis
Volym
24
Issue
4-5
Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Ämne
- Food Engineering
- Biochemistry and Molecular Biology
Nyckelord
- Antioxidant capacity
- Phenolic compounds
- Chuno
- Bolivia
- Food
- composition
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0889-1575