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Effect of storage period and exposure conditions on the quality of Bosana extra-virgin olive oil

Vacca, Vincenzo and Del Caro, Alessandra and Poiana, Marco and Piga, Antonio <1965- > (2006) Effect of storage period and exposure conditions on the quality of Bosana extra-virgin olive oil. Journal of Food Quality, Vol. 29 (2), p. 139-150. eISSN 1745-4557. Article.

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DOI: 10.1111/j.1745-4557.2006.00062.x

Abstract

Changes in quality parameters, antioxidant compounds, oxidative stability and antioxidant activity during 18 months of storage of a monovarietal extra-virgin olive oil from Bosana cultivar, and exposed to light and dark, were studied. Analysis of data showed that all the parameters underwent significant changes during storage: free acidity, peroxide and ultraviolet (UV) spectrophotometric indexes remained below the limits reported in the EEC Regulations 2568/91 and 1989/03, and these are: ≤0.8% for acidity, ≤20 meq O2/kg for peroxide and ≤2.50 and ≤0.22 for K232 and K270, respectively. Phenol and α-tocopherol content decreased during storage (42.0 and 29.6%, respectively) while chlorophylls and carotenoids underwent a decrease until 8 months of storage (49% and 30%, respectively); after that, the values remained constant. Oxidative stability and antioxidant activity had not changed dramatically during 18 months. Phenols were significantly correlated to the antioxidant activity of the oil, while oxidative stability measured by Rancimat did not show any correlation with carotenoids, chlorophylls, phenols and α-tocopherol. Regarding exposure conditions, storage in the dark was better in retaining the quality of the oil, as expected.

Item Type:Article
ID Code:1570
Status:Published
Refereed:Yes
Uncontrolled Keywords:Virgin olive oil, olive cultivar, phenols, triglycerides, minor components
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/15 Scienze e tecnologie alimentari
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze ambientali agrarie e biotecnologie agro-alimentari
Publisher:Blackwell / Wiley
eISSN:1745-4557
Deposited On:18 Aug 2009 10:05

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