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J Food Sci

Title:		Effect of cofermentation of grape varieties on aroma profiles of la mancha red wines
Author(s):		Garcia-Carpintero EG; Sanchez-Palomo E; Gomez Gallego MA; Gonzalez-Vinas MA;
Address:		"Faculty of Chemical Sciences, Area of Food Technology, Avda. Camilo Jose Cela, 10, Ciudad Real 13071, Spain. eva.gomez@uclm.es"
Journal Title:		J Food Sci
Year:		2011
Volume:		76
Issue:		8
Page Number:		C1169 - C1180
DOI:		10.1111/j.1750-3841.2011.02374.x
ISSN/ISBN:		1750-3841 (Electronic) 0022-1147 (Linking)
Abstract:		"The effect of winemaking using blends of red grape varieties cultivated in La Mancha region (Spain) on the aroma profile of wines was researched by chemical characterization. Free and glycosidically bound aroma compounds were isolated by solid phase extraction using dichloromethane and ethyl acetate, respectively, as solvents in elution and then analyzed by gas chromatography-mass spectrometry. Free and bound volatile compounds were analyzed in Cencibel, Bobal, and Moravia Agria monovarietal wines, and in 3 wines obtained with the blending of grapes: Cencibel (50%) + Bobal (50%); Cencibel (50%) + Moravia Agria (50%); Cencibel (33%) + Bobal (33%) + Moravia Agria (33%). Aroma compounds were studied in terms of odor activity values (OAVs). Ninety free aroma compounds and sixty-five bound aroma compounds were identified and quantified. The odor activity values for the different compounds were classified into 7 odorant series. The fruity and sweet series contributed most strongly to the aroma profile of all wines, independently of the winemaking technique used. In general, co-winemaking wines present a more complex chemical profile than monovarietal wines. Practical Application: Some grape varieties could benefit from this process with the presence of other varieties that might have an excess of aroma compounds. In this study, the wines were elaborated by blending different grape varieties together; this process implies co-maceration and co-fermentation steps. The co-winemaking technique could benefit from additional molecules provided by the other varieties, which results in a more complex formation than in the case of monovarietal wines. This technique provides a viable alternative to traditional winemaking methods for improving and enhancing the sensory profile of elaborated wines"
Keywords:		Fermentation Fruit/chemistry Gas Chromatography-Mass Spectrometry/methods Odorants/*analysis Solid Phase Extraction/methods Spain Vitis/*chemistry/*classification Volatile Organic Compounds/analysis Wine/*analysis;
Notes:		"MedlineGarcia-Carpintero, Eva Gomez Sanchez-Palomo, Eva Gomez Gallego, Manuel A Gonzalez-Vinas, Miguel A eng Research Support, Non-U.S. Gov't 2012/03/16 J Food Sci. 2011 Oct; 76(8):C1169-80. doi: 10.1111/j.1750-3841.2011.02374.x"