Study on Ultrasonic-assisted Extraction of Polysaccharides in Chestnut

Application of the ultrasonic-assisted method of water extraction and alcohol precipitation for polysaccharide extraction of chestnut was studied. Single factor experiments and orthogonal test were carried out to research the effects of the solid-liquid ratio, ultrasonic power, ultrasonic treatment time, extraction temperature and extraction time on the chestnut polysaccharide extraction. The results showed that the role of different factors was in the order: extraction temperature ultrasonic treatment time ultrasonic power the liquid-solid ratio extraction time. The optimum conditions of ultrasonic-assisted water extraction of polysaccharide chestnut were as follows: solid-liquid ratio 1 ∶ 25(g/mL), ultrasonic power 200 W, ultrasonic treatment time 24 min, extraction temperature 80 ℃, extraction time 2.5 h. Under these conditions, the extraction rate of the chestnut polysaccharide was 14.20%.