Document Detail

Antioxidant activity of South African red and white cultivar wines: free radical scavenging.
MedLine Citation:
PMID:  12568547     Owner:  NLM     Status:  MEDLINE    
The free radical scavenging activity of South African red (n = 46) and white (n = 40) cultivar wines was determined using 2,2'-azinobis(3-ethylbenzothialozinesulfonic acid) radical cations (ABTS(.+)) and 2,2-diphenyl-1-picrylhydrazyl radicals (DPPH.). The total antioxidant activities (TAA) of red and white wines using ABTS(.+) were 14.916 and 0.939 mM Trolox, respectively, at corresponding total phenol (TP) contents of 2339.0 and 273.8 mg of gallic acid equiv/L. Ruby Cabernet wines had the lowest TAA(ABTS) (13.177 mM Trolox) of the red wines, whereas the TAA(ABTS) values of Chardonnay and Chenin blanc wines were the highest (1.060 mM Trolox) and lowest (0.800 mM Trolox) of the white wines. The TAA(DPPH) values were of the same magnitude as the TAA(ABTS) values, and similar trends were observed. TAA correlated (P < 0.001) with total phenol content of red (r = 0.935) and white (r = 0.907) wines, as well as flavanol content of red wines (r = 0.866) and tartaric acid ester content of white wines (r = 0.767). Canonical discriminant analysis using phenolic composition and antioxidant activity was applied to differentiate between red and white cultivar wines.
Dalene De Beer; Elizabeth Joubert; Wentzel C A Gelderblom; Marena Manley
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  51     ISSN:  0021-8561     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2003 Feb 
Date Detail:
Created Date:  2003-02-05     Completed Date:  2003-03-24     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  902-9     Citation Subset:  IM    
Department of Food Science, University of Stellenbosch, Private Bag X1, 7602 Matieland (Stellenbosch), South Africa.
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MeSH Terms
Anthocyanins / analysis
Antioxidants / analysis*
Ascorbic Acid / analysis,  chemistry
Biphenyl Compounds
Discriminant Analysis
Free Radical Scavengers / analysis*,  chemistry
Fruit / chemistry*
Phenols / analysis
Picrates / chemistry
South Africa
Sulfonic Acids / chemistry
Vitis / chemistry*
Wine / analysis*
Reg. No./Substance:
0/Anthocyanins; 0/Antioxidants; 0/Benzothiazoles; 0/Biphenyl Compounds; 0/Free Radical Scavengers; 0/Phenols; 0/Picrates; 0/Sulfonic Acids; 1898-66-4/2,2-diphenyl-1-picrylhydrazyl; 28752-68-3/2,2'-azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid; 50-81-7/Ascorbic Acid

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