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Food Chem

Title:		Chemical characterization of aromas in beer and their effect on consumers liking
Author(s):		Gonzalez Viejo C; Fuentes S; Torrico DD; Godbole A; Dunshea FR;
Address:		"University of Melbourne, School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, VIC 3010, Australia. University of Melbourne, School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, VIC 3010, Australia. Electronic address: sfuentes@unimelb.edu.au"
Journal Title:		Food Chem
Year:		2019
Volume:		20190429
Issue:
Page Number:		479 - 485
DOI:		10.1016/j.foodchem.2019.04.114
ISSN/ISBN:		1873-7072 (Electronic) 0308-8146 (Linking)
Abstract:		"Identification of volatiles in beer is important for consumers acceptability. In this study, triplicates of 24 beers from three types of fermentation (top/bottom/spontaneous) were analyzed using Gas Chromatograph with Mass-Selective Detector (GC-MSD) employing solid-phase microextraction (SPME). Principal components analysis was conducted for each type of fermentation. Multiple regression analysis, and an artificial neutral network model (ANN) were developed with the peak-areas of 10 volatiles to evaluate/predict aroma, flavor and overall liking. There were no hops-derived volatiles in bottom-fermentation beers, but they were present in top and spontaneous. Top and spontaneous had more volatiles than bottom-fermentation. 4-Ethyguaiacol and trans-beta-ionone were positive towards aroma, flavor and overall liking. Styrene had a negative effect on aroma, flavor and overall liking. An ANN model with high accuracy (R?ª+=?ª+0.98) was obtained to predict aroma, flavor and overall liking. The use of SPME-GC-MSD is an effective method to detect volatiles in beers that contribute to acceptability"
Keywords:		"Beer/*analysis Flavoring Agents/analysis Gas Chromatography-Mass Spectrometry Neural Networks, Computer Principal Component Analysis Solid Phase Microextraction Taste/*physiology Volatile Organic Compounds/*analysis/isolation & purification Beer acceptabi;"
Notes:		"MedlineGonzalez Viejo, Claudia Fuentes, Sigfredo Torrico, Damir D Godbole, Amruta Dunshea, Frank R eng England 2019/06/04 Food Chem. 2019 Sep 30; 293:479-485. doi: 10.1016/j.foodchem.2019.04.114. Epub 2019 Apr 29"