Document Detail

Degradation of ascorbic acid in ethanolic solutions.
MedLine Citation:
PMID:  22994409     Owner:  NLM     Status:  MEDLINE    
Ascorbic acid occurs naturally in many wine-making fruits. The industry also uses ascorbic acid as an antioxidant and color stabilizer in the making of alcoholic beverages including white wine, wine cooler, alcopop, and fruit liqueur. However, the degradation of ascorbic acid itself may cause browning and the deterioration of color quality. This study was aimed to monitor the degradation of ascorbic acid, the formation of degradation products, and the browning in storage of ascorbic acid containing 0-40% (v/v) ethanolic solutions buffered at pH 3.2 as models of alcoholic beverages. The results show that ascorbic acid degradation in the ethanolic solutions during storage follows first-order reaction, that the degradation and browning rates increase with the increase of ethanol concentration, that the activation energy for the degradation of ascorbic acid is in the range 10.35-23.10 (kcal/mol), that 3-hydroxy-2-pyrone is an indicator and a major product of ascorbic acid degradation, and that aerobic degradation pathway dominants over anaerobic pathway in ascorbic acid degradation in ethanolic solutions.
Hsin-Yun Hsu; Yi-Chin Tsai; Chi-Chang Fu; James Swi-Bea Wu
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2012-10-11
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  60     ISSN:  1520-5118     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-29     Completed Date:  2013-09-16     Revised Date:  2014-01-09    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  10696-701     Citation Subset:  IM    
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MeSH Terms
Ascorbic Acid / chemistry*
Ethanol / chemistry*
Reg. No./Substance:
0/Solutions; 3K9958V90M/Ethanol; PQ6CK8PD0R/Ascorbic Acid
Comment In:
J Agric Food Chem. 2013 Mar 13;61(10):2580-2   [PMID:  23452173 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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