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Asian Journal of Plant Sciences
Year: 2005  |  Volume: 4  |  Issue: 6  |  Page No.: 630 - 635

Antioxidant Activity of Different Solvent Extracts of Moringa oleifera Leaves under Accelerated Storage of Sunflower Oil

Asma Siddiq, Farooq Anwar, Maleeha Manzoor and Ammara Fatima    

Abstract: The present study was aimed to evaluate the antioxidant activity of different solvent extracts of Moringa oleifera leaves by using accelerated aging of sunflower oil. Methanolic and acetone (80 and 100%) extracts of M. oleifera leaves were added at the concentration of 0.06% (wt/wt) into the refined, bleached and deodorized sunflower oil. The stabilized sunflower oil samples were subjected to accelerated aging (65°C) for a period of 18 days and analysis was done periodically after every three days. The extent of oxidation was followed by the measurement of AI-, PV-, conjugated dienes-, trienes- and para-anisidine values. The overall order of antioxidant efficacy of the extracts of M. oleifera leaves as assessed by various oxidation parameters was followed as; 80% methanolic extract > 100% methanolic extract > 80% acetone extract > 100% acetone extract. The antioxidant activity of M. oleifera leaves might be attributed to the presence of high amount of flavonoids, polyphenolics and tocopherol contents. The results of present study revealed that M. oleifera leaves might be explored as a viable source of natural antioxidants and nutraceuticals.

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