Journal
SCIENTIA HORTICULTURAE
Volume 144, Issue -, Pages 141-152Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scienta.2012.07.006
Keywords
Virgin olive oil; Harvest date; Secoiridoids; Tocopherols; Antioxidant activity; PCA
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Funding
- Turkish Council of Higher Education (YOK)
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Monovarietal virgin olive oil from five different Turkish varieties (Egriburun, Karamani, Halhali, Saurani and Hasebi) from Hatay province which were harvested on three different occasions have been analyzed to evaluate minor components (phenolic compounds, tocopherols and pigments), fatty acid profiles and antioxidant activity in order to determine the effects of both the nature of the variety and the time of harvest. The high total phenolics, secoiridoid aglycones, alpha-tocopherol and antioxidant activity of Saurani variety makes the oil of this variety superior to other varieties analyzed in this study. After evaluating the correlation matrix of the data set, the variables such as secoiridoids (3,4-DHPEA-EDA; 3,4-DHPEA-EA; p-HPEA-EDA and p-HPEA-EA), some of the phenolic compounds (hydroxytyrosol, vanillic acid and luteolin) and oxidation parameters (beta carotene bleaching activity, peroxide value and free fatty acids) were finally decided as the three factors which led to explore the underlying pattern of relationships by using principal component analysis. (C) 2012 Elsevier B.V. All rights reserved.
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