Total Phenolic Contents, Radical Scavenging And Cyclic Voltammetry Of Three Native Date (phoenix Dactylifera L.) Varieties Grown In Ouargla

Fruits of date palm (Phoenix dactylifera L.) are consumed throughout the world and are a vital component of the diet in most Arabian countries. This study has been carried out to evaluate the total phenolic content and the antioxidant activity of three date palm fruit varieties grown in Ouargla (Algeria): Degla Baidha (DB), Tamjhourt (Tam), and Tefezauine (Tef). Consequently, the total phenolic contents (TPC) of these extracts will be measured using Folin Ciocalteu spectrophotometric method. TPC ranged from 9.496 to 23.045mg gallic acid equivalents (GAE/100g). Thereafter, the antioxidant properties of these polyphenols were evaluated by chemical and electrochemical assays. Hydroxyl radical (.OH) scavenging activity and 2,2-diphenyl-1- picrylhydrazyl (DPPH) radical scavenging activity were the chemical assays, whereas, cyclic voltammetry technique (CV) in aprotic media was used as the electrochemical assay. This study suggest that Algerian date palm fruit may serve as a good source of natural antioxidants, may be used in the prevention of various free radicals related diseases.