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Phenolic compositions of 50 and 30 year sequences of Australian red wines: the impact of wine age

Citation

McRae, JM and Dambergs, RG and Kassara, S and Parker, M and Jeffery, DW and Herderich, MJ and Smith, PA, Phenolic compositions of 50 and 30 year sequences of Australian red wines: the impact of wine age, Journal of Agricultural and Food Chemistry, 60, (40) pp. 10093-10102. ISSN 0021-8561 (2012) [Refereed Article]

Copyright Statement

Copyright 2012 American Chemical Society

DOI: doi:10.1021/jf301571q

Abstract

The phenolic composition of red wine impacts upon the color and mouthfeel and thus quality of the wine. Both of these characteristics differ depending on the age of a wine, with the purple of young wines changing to brick red and the puckering or aggressive astringency softening in older wines. This study investigated the color parameters, tannin concentrations and tannin composition of a 50 year series of Cabernet Sauvignon wines from a commercial label as well as 30 year series of Cabernet Sauvignon and Shiraz wines from a separate commercial label to assess the impact of wine age on phenolic composition and concentration. The wine color density in wines of 40 to 50 years old was around 5 AU compared with 16 AU of wine less than 12 months old, which correlated well with the concentration of non-bleachable pigments and pigmented polymers. Conversely, the anthocyanin concentrations in 10 year old wines were substantially lower than that of recently bottled wines (around 100 mg/L compared with 627 mg/L, respectively), adding further evidence that non-bleachable pigments including pigmented polymers play a much larger role in long-term wine color than anthocyanins. No age-related trend was observed for tannin concentration, indicating that the widely noted softer astringency of older red wines cannot necessarily be directly related to lower concentrations of soluble wine tannin and is potentially a consequence of changes in tannin structure. Wine tannins from older wines were generally larger than tannins from younger wines and showed structural changes consistent with oxidation.

Item Details

Item Type:Refereed Article
Keywords:tannin, wine color, wine age, phenolics, anthocyanins
Research Division:Agricultural and Veterinary Sciences
Research Group:Horticultural Production
Research Field:Oenology and Viticulture
Objective Division:Manufacturing
Objective Group:Processed Food Products and Beverages (excl. Dairy Products)
Objective Field:Beverages (excl. Fruit Juices)
Author:Dambergs, RG (Dr Robert Dambergs)
ID Code:84285
Year Published:2012
Web of Science® Times Cited:23
Deposited By:Agricultural Science
Deposited On:2013-05-02
Last Modified:2017-11-06
Downloads:0

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