Ultrasonic-assisted Solvent Extraction of Total Saponins from A. trifoliatus Leaves

In the present study,ultrasonic treatment was applied to assist the extraction of total saponins from defatted and decolorized A.trifoliatus leaves with 70% ethanol.The ultrasonic-assisted extraction technology was optimized by orthogonal test design based on single factor test.Results showed that the optimal ultrasonic power,ultrasonic treatment duration,extraction temperature and ratio of solid to liquid for the extraction of total saponins were 80%(relative value to the maximum power),35 min,60 ℃ and 1:10;under this condition,the extraction yield of total saponins was 16.32%,which was higher than that obtained by Soxhlet extraction.