SOLVENT AND TECHNIQUES EXTRACTION INFLUENCE ON PHYTOCHEMICAL PROFILE AND FREE RADICALS INHIBITION OF PHEONIX DACTYLIFERA L

The main of this investigation was to compare the extraction efficiency of different methods with various solvents from Phoenix dactylifera L extracts. The antioxidant activity and total phenolic compounds of extracts were evaluated using the various method. The highest extraction yield was founded in 70% methanol. Acetone extract exhibited a higher total antioxidant activity, ferric reducing antioxidant power and DPPH radical scavenging activity. The same extract also exhibited the highest phenolic, flavonoid, flavanol and condensed tannins contents. The results revealed that the ultrasonic is most suitable for the extraction of phenolic compounds and thus showing high levels of phenolic content and very high antioxidant capacities relative to the soxhlet and maceration technique. The results propose that Phoenix dactylifera L leaves extract can be considered as a rich source of natural bioactive compounds.