Effect of polar solvent on the efficiency of phenolic compounds and antioxidant potency of the lavender wild growing in Tunisia

A highest polar solubility of phenolic and flavonoids compounds of Lavandula stoechas required the use of appropriate solvent during extraction process. Extraction following an increase ingredient of polarity revealed that the chloroform seems as the best solvent able to release polyphenols followed by the ethyl-acetate. Total phenolic and flavonoids extracted with chloroform were respectively, 282.7 mg Eq GAE/g DW and 125.91 mg Eq QE/g DW. Even for the tree other solvents obtained results showed importance richness of the lavender on polyphenols. Amounts were correlated to the highest antioxidant potency approved. Main functional groups were detected and identified by Fourier transform infrared spectrophotometer (FTIR). Results give to the studied species an important alternative as a promising ecological natural source of bioactive antioxidant compounds and to be incorporated in food, pharmaceutical and cosmetics manufactures.