Journal
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
Volume 92, Issue 9, Pages 1293-1301Publisher
WILEY
DOI: 10.1007/s11746-015-2688-2
Keywords
Tocopherols; Maturity index; Location; Low storage temperature; Virgin olive oil
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Funding
- Ministry of Science, Education and Sports of the Republic of Croatia [091-091 0468 0364]
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The influence of agronomical factors (two growing areas and four harvest periods) and storage conditions of virgin olive oils (room temperature, +4 and -20 A degrees C) on tocopherols was investigated on two cultivars having significantly different tocopherol content (Oblica 269-443 mg/kg, Leccino 403-784 mg/kg). alpha-Tocopherol accounted for 97 % of total tocopherols and its content decreased during ripening of both cultivars. In a warmer growing area both cultivars gained a higher gamma-tocopherol content while only Leccino showed a higher content of alpha-tocopherol. After 12 months of storage alpha-tocopherol content decreased by up to 27 %. Lower storage temperatures did not always contribute to the higher stability of alpha-tocopherol compared to room temperature.
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