was used as an ultrasound source. The extraction temperature was maintained at temperature of 20 C. The sample beakers were immersed into the ultrasonic bath for irradiation under extraction conditions including 70% ethanol, particle size of 40–60 mesh and solvent to solid ratio of 25 ml/g. When the extraction finished, the mixtures were filtered off through 0.45 lm membrane filter. Finally, the filtrates were collected for HPLC analyses. All samples were prepared and analyzed in triplicate.