Phenolic Content and Antioxidant Activity of Date Seeds
Seeds of five varieties of date palm (Phoenix dactylifera L.) grown in Qassim region, Saudi Arabia, were analyzed for their proximate composition, including total phenolic compounds (TP), and antioxidant activities. Water, ethanol, methanol, and acetone, were evaluated as different polarity solvents to extract the phenolic compounds. Ethanol exhibited the highest extraction ability for such phenolic compounds (4.94%) followed by acetone (4.30%) and methanol (4.00%). Also, proximate composition (especially TP) in date seeds varied according to variety. The antioxidant activity of ethanolic extracts, determined as Trolox equivalent antioxidant capacity (TEAC) using 1,1-Diphenyl-2- Picrylhydrazyl (DPPH) assay, ranged from 1163 to 1650 µmole TEAC/g on wet weight basis. This study exhibits the antioxidant activity of date seeds which could be considered as a good source of antioxidant ingredient.
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