The effect of microwave-assisted extraction(MAE) technique on the extraction rate of total Rheum anthraquinone in Rheum officinale was studied. Extraction techniques using microwave extraction, ultrasonic extraction(UE) and Soxhlet extraction were compared for the extraction rate of total Rehum anthraquinone in Rheum officinale. The extracts were analyzed by visible-spectrophotometric. Among the three methods, the efficiency of MAE was 1.13 times that of ultrasonic extraction, and 1.29 times th...