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Effect of pretreatment on extraction of Cordycepic polysaccharides by water extraction and alcohol precipitation

Zhao Feng-li

Abstract

Compared the effect of water extraction,ultrasonic wave,microwave on extraction of polysaccharides from Cordceps militaris(L.)Link.The results showed that when using 70% alcohol the sedimentation effect was better.Three pretreatment method all could improve the extraction rate,ultrasonic wavemicrowavewater extraction,and the pretreatment effect of ultrasonic wave was best.The extraction rate of polysaccharides was 7.965mg/mL under the condition of ultrasonic wave frequency 40kHz and extraction 2 times when ultrasonic time 30min,temperature 80℃ and ultrasonic power 500W.The results showed that ultrasonic wave pretreatment was superior.

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Key concepts: Ultrasonic sensor, Extraction (chemistry), Polysaccharide, Alcohol, Chromatography, Water extraction, Materials science, Precipitation