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Food Chem

Title:		Factors affecting extraction of adsorbed wine volatile compounds and wood extractives from used oak wood
Author(s):		Coelho E; Teixeira JA; Domingues L; Tavares T; Oliveira JM;
Address:		"CEB - Centre of Biological Engineering, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal. Electronic address: e.coelho@ceb.uminho.pt. CEB - Centre of Biological Engineering, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal"
Journal Title:		Food Chem
Year:		2019
Volume:		20190513
Issue:
Page Number:		156 - 164
DOI:		10.1016/j.foodchem.2019.05.093
ISSN/ISBN:		1873-7072 (Electronic) 0308-8146 (Linking)
Abstract:		"During ageing, wood adsorbs volatile compounds from beverages. However, chemical interactions involved in sorption still remain unclear, as well as wood capacity to transfer such compounds to subsequent matrices when reused. Therefore, extractions were conducted from used wood manipulating variables such as ethanol concentration, contact temperature and pH, in order to determine their effect in the interaction and consequent recovery of wine volatiles from wood. Mathematical models were outlined, which demonstrated an exclusive effect of ethanol concentration on the extraction of wine volatiles adsorbed in wood, more prominent for compounds of higher hydrophobicity. Thus adsorption of wine volatiles was shown to be based on hydrophobic interactions. Recovery of wood extractives was also modeled, confirming the known positive effect of ethanol and temperature on the overall extraction of characteristic wood compounds. When reused, wood transferred wine compounds to hydroalcoholic matrices, demonstrating its impact and potential as a vector for aroma transference"
Keywords:		Adsorption Ethanol/chemistry Hydrogen-Ion Concentration Quercus/*chemistry Temperature Time Factors Volatile Organic Compounds/*chemistry Wine/*analysis Wood/*chemistry Hydrophobic adsorption Wine volatiles Wood ageing Wood extractives Wood sorption;
Notes:		"MedlineCoelho, Eduardo Teixeira, Jose A Domingues, Lucilia Tavares, Teresa Oliveira, Jose M eng England 2019/06/09 Food Chem. 2019 Oct 15; 295:156-164. doi: 10.1016/j.foodchem.2019.05.093. Epub 2019 May 13"