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Keywords
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Antioxidant activity, Clove, Grape seed oil, Summer savory, Tarragon
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Abstract
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BACKGROUND: Autoxidation is an irreversible reaction which occurs with the effect of oxygen in
the air, and results in unpleasant taste and smell that are known as the signs of rancidity in oil.
OBJECTIVES: In this study, the antioxidant potential of clove, summer savory and tarragon essential
oils (EOs) in grape seed oil was evaluated.
METHODS: Effects of EOs at different concentrations (0.3, 0.5, 1, and 1.5 %, v/v) on peroxide value
(PV) and thiobarbituric acid reactive substances (TBARS) of grape seed oil at 60 ºC were investigated.
RESULTS: Results showed 1.5% clove showed the lowest PV (52.13 meq/kg) at the end of the period.
Among EO- treated samples, the highest PV was seen in samples treated with tarragon. There was no
significant difference between the TBARS of samples containing 1% clove and 1.5% savory at day 10 of
storage. TBARS of clove treated samples increased slightly toward the end of storage and similar trend
was observed for savory-treated samples. TBARS values of tarragon treated samples at each storage
time were higher than those for clove and savory EOs.
CONCLUSIONS: The antioxidant activity of EOs in grape seed oil was as follows: clove > summer
savory > tarragon.
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