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Optimization of Ultrasound-Assisted Extraction of Polysaccharides from the Chinese Medicinal Plant Rhodiola Sachalinensis A. BOR

Ultrasound-assisted extraction (UAE) of polysaccharides from the Chinese medicinal plant Rhodiola sachalinensis A. BOR (PRs) was studied. The effects of four factors (extraction time, ultrasonic power, liquid-solid ratio and extraction temperature) on the extraction yield of PRs were investigated by the single-factor test, and the optimum UAE conditions were investigated by the orthogonal test. The results demonstrated that the optimum UAE conditions for PRs were as followings: extraction time of 30 min, ultrasonic power of 85 W, liquid-solid ratio of 45 ml/g, and extraction temperature of 45°C. The present data might provide a theoretic base for full utilization of Rhodiola sachalinensis A. BOR.