Ultrasound-Assisted Extraction of Phenolic Compounds from Moroccan Lavandula stoechas L.: Optimization Using Response Surface Methodology

Secondary plant metabolites, in particular phenolic compounds, are characterized by great diversity the kingdom and widely used medical industrial fields. The extraction of these compounds represents a critical step, differences conditions strongly affect yields total concentrations polyphenols extracts. In this way, objective present study was to optimize parameters from Lavandula stoechas using technique assisted ultrasound. Yield concentration have been optimized, taking into account three variables, time (min), ethanol (%), solvent/extract ratio (ml/g). optimum yield (31.88%) obtained ensuring following parameters: an 40%, liquid/solid 30 ml/g, processing 32.62 min. maximum (190.14 mg gallic acid equivalents (GAE)/g) after 21.5 min extraction, with ml/g at 40%. order obtain (24.9%) GAE/g) simultaneously, must be adjusted: min, experimental values were good agreement predicted values, which suggests that ultrasonic model adopted is validated.