Characterization of Virgin Olive Oils with Two Kinds of 'Frostbitten Olives' Sensory Defect.
The frost of olives on the tree due to drops of temperature can produce sensory defects in virgin olive oil (VOO). Temperature changes can be abrupt with freeze-thaw cycles or gradual, and they produce sensory and chemical variations in the oil. This study has analyzed the quality parameters (free fatty acids, peroxide value, UV absorption, and fatty acid ethyl esters) and phenols of VOOs described with the 'frostbitten olives' sensory defect. The phenol profiles allowed grouping these VOOs into two types. One of them, characterized with "soapy" and "strawberry-like" aroma descriptors, had higher values of 1-acetoxypinoresinol, pinoresinol, and aldehydic form of the ligstroside aglycon. The other one, characterized with "wood" and "humidity" descriptors, had higher concentrations of luteolin and apigenin. Most VOOs (75%) from the first group, associated with abrupt drops of temperature, have concentration of phenols higher than the value established by the health claim on olive oil polyphenols approved by the European Commission.
Instituto de la Grasa (CSIC) , Campus Universidad Pablo de Olavide, Edificio 46, Carretera de Utrera, km 1, 41013 Sevilla, Spain.
Inmaculada
I
Romero
Instituto de la Grasa (CSIC) , Campus Universidad Pablo de Olavide, Edificio 46, Carretera de Utrera, km 1, 41013 Sevilla, Spain.
Ramón
R
Aparicio-Ruiz
Instituto de la Grasa (CSIC) , Campus Universidad Pablo de Olavide, Edificio 46, Carretera de Utrera, km 1, 41013 Sevilla, Spain.
Celia
C
Oliver-Pozo
Instituto de la Grasa (CSIC) , Campus Universidad Pablo de Olavide, Edificio 46, Carretera de Utrera, km 1, 41013 Sevilla, Spain.
Ramón
R
Aparicio
Instituto de la Grasa (CSIC) , Campus Universidad Pablo de Olavide, Edificio 46, Carretera de Utrera, km 1, 41013 Sevilla, Spain.
Diego L
DL
García-González
D000328:Adult; D005260:Female; D005638:Fruit / Q000737:chemistry; D006801:Humans; D008297:Male; D008875:Middle Aged; D015394:Molecular Structure; D031658:Olea / Q000737:chemistry*; D000069463:Olive Oil / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry; D013649:Taste
D000069463:Olive Oil; D010636:Phenols
fatty acid ethyl esters; health claim; phenols; quality; virgin olive oil; ‘frostbitten olives’ defect