An odour detection threshold determination of all four possible stereoisomers of oak lactone in a white and a red wine
Date
2006
Authors
Brown, R.
Sefton, M.
Taylor, D.
Elsey, G.
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Journal article
Citation
Australian Journal of Grape and Wine Research, 2006; 12(2):115-118
Statement of Responsibility
Rachel C. Brown, Mark A. Sefton, Dennis K. Taylor and Gordon M. Elsey
Conference Name
Abstract
Odour detection thresholds were determined for all four stereoisomers of oak lactone in both red and white wine. The natural cis-isomer was found to have a significantly lower detection threshold than its non-natural enantiomer in both media, and lower than indicated by most other sensory studies. The odour detection threshold for the natural trans-isomer was seven times higher than for the natural cis. Compared to its enantiomer, the natural trans-isomer had a lower detection threshold in the white wine medium, but slightly higher in the red. Duo-trio difference testing between the two trans-isomers added at the same concentration showed no significant difference between the two for both media. Similarly, a duo-trio test conducted between the natural cis-isomer and a mixture of the same amount of natural cis-oak lactone plus an equivalent concentration of the trans-isomer indicated that the latter had little or no influence on the odour impact of the cis-form.
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Copyright © 2008 Australian Society of Viticulture and Oenology Inc.