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Changes during storage of quality parameters and in vitro antioxidant activity of extra virgin monovarietal oils obtained with two extraction technologies

Fadda, Costantino and Del Caro, Alessandra and Sanguinetti, Anna Maria and Urgeghe, Pietro Paolo and Vacca, Vincenzo and Arca, P.P. and Piga, Antonio <1965- > (2012) Changes during storage of quality parameters and in vitro antioxidant activity of extra virgin monovarietal oils obtained with two extraction technologies. Food Chemistry, Vol. 134 (3), p. 1542-1548. ISSN 0308-8146. eISSN 1873-7072. Article.

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DOI: 10.1016/j.foodchem.2012.03.076

Abstract

Extraction technology has a great effect on quality of olive oils. This paper studied 18 months of storage of two Sardinian extra virgin monovarietal oils obtained with a traditional and with a low oxidative stress technology. Oil samples were subjected to the following chemical analyses: acidity, peroxide value, ultraviolet light absorption K232 and K270, carotenoids, chlorophylls, tocopherols and total polyphenols. The antioxidant capacity of oils, polyphenol extract and oil extract (remaining after polyphenol extraction) was also determined as radical scavenging activity. The results show that both extraction technologies resulted in minor changes in legal and quality indices during storage, due surely to the high quality of the oils as well as to the very good storage conditions used. Oils obtained with the low oxidative stress technology showed lower peroxide value and acidity and resulted in up to 103% higher total polyphenol content as well as increased radical-scavenging activity, with respect to oils obtained with the traditional technology.

Item Type:Article
ID Code:7559
Status:Published
Refereed:Yes
Uncontrolled Keywords:Activity, extra virgin olive oil, quality, radical scavenging activity
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/15 Scienze e tecnologie alimentari
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Agraria
Publisher:Elsevier
ISSN:0308-8146
eISSN:1873-7072
Deposited On:11 May 2012 11:25

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