Abstract
The aim of this work was to study the changes in the lipid substrate and in the minor components and specially in the phenolic fraction of commercial virgin olive oils of Arbequina cultivar after 12 months of storage. An increase of oleic acid percentage was found in the fatty acid composition. Important losses of chlorophyll, carotenoids, and total phenol content of oils occur after the storage period. Significant decreases were observed in secoiridoid derivatives and 3,4-DHPEA-AC after the storage period, while lignans were the more stable phenolic compounds. α-tocopherol disappeared after the storage period, in all oils.
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