Journal
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
Volume 18, Issue 5, Pages 375-386Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jfca.2004.02.010
Keywords
antioxidants; anthocyanins; antiradical activity; hellenic native grape varieties; HPLC; vitis vinifera
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In order to investigate the anthocyanin content and ascertain whether anthocyanins account for antioxidant activity in grape berry extracts, six prevalent anthocyanins were determined in 13 Hellenic native and four of the so-called international varieties widely cultivated in Greece. Anthocyanin content varied from 85.7 to 1914.0 mg kg(-1) fresh berry weight, the mean being 731.7 mg kg(-1). Assessment of the antiradical activity of extracts using the stable 2,2-diphenyl-beta-picrylhydrazyl radical revealed a low and statistically insignificant correlation (r(2) = 0.0724, P > 0.05) with total anthocyanin content, suggesting that other constituents are likely to exert strong antioxidant effects in grapes. (C) 2004 Elsevier Inc. All rights reserved.
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