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Stabilization of Sunflower Oil During Accelerated Storage: Use of Basil Extract as a Potential Alternative to Synthetic Antioxidants
Authors:Manel Ben-Ali  Khalil Dhouib  Mohamed Damak  Noureddine Allouche
Affiliation:1. Laboratory of Chemistry of Natural Substances, Faculty of Sciences of Sfax, The University of Sfax, Sfax, Tunsianoureddineallouche@yahoo.fr;3. Laboratory of Chemistry of Natural Substances, Faculty of Sciences of Sfax, The University of Sfax, Sfax, Tunsia
Abstract:The antioxidant efficacy of basil extracts was estimated in stabilization of sunflower oil. The basil essential oil was analyzed by gas chromatography–mass spectrometry. Twenty-two compounds were identified representing 93.74% of the total essential oil. Basil methanolic extract was thermally evaluated by heating at 185°C. At the 100 min heating time, the extract exhibited antioxidant activity higher than that of butylated hydroxytoluene. Different concentrations of methanolic extract were added to sunflower oil. Selected parameters (i.e., weight gain, induction period to primary oil oxidation, peroxide value, conjugated dienes, and conjugated trienes) were considered for evaluating the effectiveness of basil in stabilization of sunflower oil. Basil methanolic extract showed good antioxidant activity according to synthetic antioxidants. Basil may be used as a natural antioxidants to prevent vegetable oils oxidation.
Keywords:Basil  Essential oil  Sunflower oil  Antioxidant activity  Thermal stability
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