Abstract
Leaf of Phoenix dactylifera L is a rich source of natural bioactive compounds, which serve many functions in human body and prevent food from oxidation processes. The study aimed to optimize the pH extraction medium of polyphenol from Phoenix dactylifera L using different system for pH 3 to pH 7 was carried out. In addition, influence of pH medium extraction on phenolic content, proanthocyanidins, anthocyanin, antioxidant and anti-inflammatory activities. The total phenolic content measured by Folin-Ciocalteu method was as well conducted. Antioxidant efficacies of different pH extracts were estimated by their abilities to scavenge ABTS and FRAP. It was observed that phenolic content increased from pH 5 at 6, and the pH effects on the composition extraction process were illustrated. For the antioxidant activity, similar results are observed. The high anti-inflammatory activity founded for weak acid (pH 5 and 6). The optimum pH value of medium aqueous extraction it is 6.
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