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J Agric Food Chem

Title:		Study of Volatile Compounds of Virgin Olive Oils with 'Frostbitten Olives' Sensory Defect
Author(s):		Romero I; Garcia-Gonzalez DL; Aparicio-Ruiz R; Morales MT;
Address:		"Instituto de la Grasa (CSIC), Campus Universidad Pablo de Olavide , Edificio 46, Ctra. de Utrera, km. 1, 41013 Sevilla, Spain. Department of Analytical Chemistry, University of Seville , C/Prof. Garcia Gonzalez, 2, 41012 Sevilla, Spain"
Journal Title:		J Agric Food Chem
Year:		2017
Volume:		20170518
Issue:		21
Page Number:		4314 - 4320
DOI:		10.1021/acs.jafc.7b00712
ISSN/ISBN:		1520-5118 (Electronic) 0021-8561 (Linking)
Abstract:		"Freeze injuries in olives are responsible for the 'frostbitten olives' sensory defect that is sometimes detected in virgin olive oil. This defect is becoming one of the most common negative attributes today because climate change has modified weather patterns. The temperature changes can take place abruptly, with rapid freeze-thaw cycles, or gradually. These changes produce significant alterations in the quality of the oils. This study analyzed the volatile composition of virgin olive oils characterized with 'frostbitten olives' defect. The volatile information allowed grouping these oils into two types characterized with two different profiles. One of them is characterized by 'soapy' and 'strawberry-like' perceptions and the presence of two volatile compounds (ethyl 2-methyl butanoate and ethyl propanoate). The second profile is characterized by 'wood' and 'humidity' descriptors and a high concentration of two volatiles (pentanal and octanal). These results on volatiles explain the existence of two sensory profiles associated with the 'frostbitten olives' defect"
Keywords:		"Adult Chromatography, Gas Female Fruit/chemistry Humans Male Middle Aged Olea/*chemistry Olive Oil/*analysis Taste Temperature Volatile Organic Compounds/*analysis quality virgin olive oil volatiles 'frostbitten olives' defect;"
Notes:		"MedlineRomero, Inmaculada Garcia-Gonzalez, Diego L Aparicio-Ruiz, Ramon Morales, Maria T eng 2017/05/11 J Agric Food Chem. 2017 May 31; 65(21):4314-4320. doi: 10.1021/acs.jafc.7b00712. Epub 2017 May 18"