Degradation of Ascorbic Acid in Ethanolic Solutions

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 browni...

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Bibliographic Details
Published inJournal of agricultural and food chemistry Vol. 60; no. 42; pp. 10696 - 10701
Main Authors Hsu, Hsin-Yun, Tsai, Yi-Chin, Fu, Chi-Chang, Wu, James Swi-Bea
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 24.10.2012
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Summary: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.
Bibliography:http://dx.doi.org/10.1021/jf3032342
ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0021-8561
1520-5118
DOI:10.1021/jf3032342