ultrasonic extraction
8.Ultrasonic extraction,soxhlet extraction,ethanol reflux extraction, supercritical fluid extraction(SFE), acidolysis and ethanol extraction are used to extract ursolic acid from cornus officinalis distributed at Nanyang district, Henan province. The content of ursolic acid is determined with high performance liquid chromatography.
10.Ultrasonic extraction-HPLC was a fast determination method for nicotine with higher accuracy from tobacco.

