Stereoisomers of ß-Methyl-γ-Octalactone. I. Quantification in Brandies as a Function of Wood Origin and Treatment of the Barrels

1 January 1995

journal article
Published by American Society for Enology and Viticulture in American Journal of Enology and Viticulture

Vol. 46 (4) , 419-423
https://doi.org/10.5344/ajev.1995.46.4.419

Abstract

The four stereoisomers of oak lactone (ß-methyl-γ-octalactone) were quantified in different brandies by using multidimensional GC analysis. For most of the brandies, the oak origin, the heat treatment and charring of the barrels, the alcoholic content, and the aging are known. The only (3S, 4S) and (3S, 4R) stereoisomers of oak lactone were found in brandies. This study points out the influence of the origin of the wood for the amount of oak lactone. Brandies matured in barrels made with American white oak contain a greater amount of (3S, 4S)-oak lactone than those matured in barrels made with Quercus robur L. Toasting and charring of the barrels did not modify the enantiomeric ratios.

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