The effects of size, temperature and air contact on the outcome of heating oak fragments
- 1 October 2005
- journal article
- Published by Hindawi Limited in Australian Journal of Grape and Wine Research
- Vol. 11 (3), 348-354
- https://doi.org/10.1111/j.1755-0238.2005.tb00034.x
Abstract
The concentrations of the important oak aroma volatiles guaiacol, 4-methylguaiacol cis- and trans-oak lactone and vanillin in extracts of French and American oak heated under various conditions were measured using stable isotope dilution analyses coupled with gas chromatography-mass spectrometry. Heating resulted in marked increases in the concentrations of guaiacol, 4-methylguaiacol and vanillin, with more formed at higher temperature. Approximately twice as much guaiacol and 4-methylguaiacol and two to five times as much vanillin were formed by heating in the presence of air compared to heating under argon. Oak lactone concentration was less affected by heating. The effects of heating different sized oak pieces were investigated for French and American oak samples. Compared to heating larger oak pieces, heating smaller fragments of oak generated up to twice as much guaiacol and 4-methylguaiacol and two to four times as much vanillin at 235oC for both French and American oak. This effect is ascribed to the exposure of a greater surface area of oak to air when smaller fragments are heated. Variable effects were observed for cis- and trans-oak lactone. Variation in chip size, as well as heating time and temperature, is clearly one way of obtaining different aroma profiles from oak products.Keywords
This publication has 22 references indexed in Scilit:
- The effect of oak wood source, location of seasoning and coopering on the composition of volatile compounds in oak-matured winesAustralian Journal of Grape and Wine Research, 2008
- The Effects of Sample Preparation and Gas Chromatograph Injection Techniques on the Accuracy of Measuring Guaiacol, 4-Methylguaiacol and Other Volatile Oak Compounds in Oak Extracts by Stable Isotope Dilution AnalysesJournal of Agricultural and Food Chemistry, 2004
- Volatile Compounds in Spanish, French, and American Oak Woods after Natural Seasoning and ToastingJournal of Agricultural and Food Chemistry, 2003
- Changes in Low Molecular Weight Phenolic Compounds in Spanish, French, and American Oak Woods during Natural Seasoning and ToastingJournal of Agricultural and Food Chemistry, 2001
- Wood maturation of distilled beveragesTrends in Food Science & Technology, 1998
- Oak lactones in alcoholic beveragesFood Reviews International, 1996
- Changes in wood extractives from oak cask staves through maturation of scotch malt whiskyJournal of the Science of Food and Agriculture, 1993
- Formation of Smoke Flavor Compounds by Thermal Lignin DegradationPublished by American Chemical Society (ACS) ,1992
- Effect of Heat Treatment of Oak Wood Extractable CompoundsHolzforschung, 1990
- The contribution of wood to the flavor of alcoholic beveragesFood Reviews International, 1989