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Food Chem

Title:		Dry vs soaked wood: modulating the volatile extractible fraction of oak wood by heat treatments
Author(s):		Duval CJ; Sok N; Laroche J; Gourrat K; Prida A; Lequin S; Chassagne D; Gougeon RD;
Address:		"Equipe Procedes Alimentaires et Physico-Chimie, UMR A 02.102 PAM AgroSup Dijon/Universite de Bourgogne, Institut Universitaire de la Vigne et du Vin, Jules Guyot, Rue Claude Ladrey, BP 27877, 21078 Dijon Cedex, France. lilo.duval@gmail.com"
Journal Title:		Food Chem
Year:		2013
Volume:		20121108
Issue:		1
Page Number:		270 - 277
DOI:		10.1016/j.foodchem.2012.09.117
ISSN/ISBN:		1873-7072 (Electronic) 0308-8146 (Linking)
Abstract:		"The aim of this study was to analyze the impact of the water content of wood on the concentrations of volatile compounds which can be extracted after heat treatments. Head Space-Solid Phase Micro Extraction Gas Chromatography coupled to Mass Spectrometry (HS-SPME GC-MS) has been used to compare the concentrations of six aroma compounds (vanillin, furfural, eugenol, guaiacol and cis- and trans-whisky lactones) in hydroalcoholic extracts of heated oak wood samples either previously soaked in hot water or not. Except for eugenol, concentrations of extracted aromas appeared to be lower in soaked woods than in dry woods for temperatures up to 200 degrees C. If a delaying effect of water could explain such overall lower extracted concentrations from soaked woods, a PCA analysis revealed that for the longer duration (25 min of heat treatment), the adsorbed water could promote a higher impact of furfural, eugenol and both whisky lactones on the composition of hydroalcoholic extracts, suggesting that alternative mechanisms of thermal modifications of the wood macromolecular network could exist at high temperatures in presence of adsorbed water"
Keywords:		Furaldehyde/analysis/isolation & purification Gas Chromatography-Mass Spectrometry Guaiacol/analysis/isolation & purification Plant Extracts/*analysis/*isolation & purification Quercus/*chemistry Solid Phase Microextraction Temperature Volatile Organic Co;
Notes:		"MedlineDuval, Charlie J Sok, Nicolas Laroche, Jeremy Gourrat, Karine Prida, Andrei Lequin, Sonia Chassagne, David Gougeon, Regis D eng Comparative Study Research Support, Non-U.S. Gov't England 2012/12/26 Food Chem. 2013 May 1; 138(1):270-7. doi: 10.1016/j.foodchem.2012.09.117. Epub 2012 Nov 8"