Extraction and purification method of burdock tea polysaccharide
A purification method and technology of tea polysaccharides, applied in the field of extraction and purification of burdock tea polysaccharides, can solve the problems of lack of economic value and low extraction efficiency of burdock tea polysaccharides, and achieve economic value improvement, good in vitro antioxidant activity, and good market development foreground effect
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[0009] Weigh the prepared burdock tea into a beaker after crushing it, add ten times the quality of the tea powder and mix it evenly, in a water bath at 65℃ for 2.5h, use a rotary evaporator, set the speed to 70r / min, bath temperature 65℃, time 25min , Concentrated to 0.2 times the original volume. Add 5 times the volume of 95% ethanol to the concentrated solution and dissolve for 12 hours. Centrifuge at 5000r / min for 10min and filter the precipitate to obtain crude polysaccharide. The crude polysaccharide was deproteinized by the Sevag method. The volume ratio of chloroform-n-butanol was 4:1 to prepare Sevag reagent. The crude polysaccharide solution was placed in a separatory funnel, and 0.2 times the solution volume of Sevag reagent was added. Shake 18min, 5000r / min Centrifuge for 8 minutes to obtain the supernatant. Continue to repeat the previous operation until no milky white denatured protein is precipitated between the chloroform layer and the n-butanol...
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