Method for extracting dragon fruit flower polysaccharide

Abstract

The invention relates to a method for extracting dragon fruit flower polysaccharide, belonging to the field of polysaccharide extraction processes. The method mainly comprises the steps: combining an ultrasonic extraction process and a hot water extraction process, wherein the ultrasonic power is 160-180 W, the ratio of the material to water is (1:35)-(1:45); and after the ultrasonic extraction of 40-50 min, performing 90-DEG C water bath for 1-2 h, centrifugally extracting supernate, and performing ethanol precipitation to obtain the dragon fruit flower polysaccharide. According to the invention, an extraction method which is rapid, simple, convenient and safe, is low in cost, and does not damage components is established; compared with a single hot water extraction method, the method has the advantages that the extraction time is shortened by above 35.0 percent, the extraction yield is increased by 29.1 percent, and the polysaccharide extraction rate is 7.21 percent. The dragon fruit flower polysaccharide extracted by adopting the method is remarkable in biological activity; the total antioxidant capacity of a 1 mg / ml dragon fruit flower polysaccharide solution reaches 5.21 U / ml, and the scavenging activity on hydroxyl free radicals is 2188.78 U / ml.

Description

technical field [0001] The invention relates to a method for extracting polysaccharides from dragon fruit flowers, which belongs to the field of polysaccharide extraction technology. Background technique [0002] Pitaya is a plant of the genus Tianchi or Snakewhip in the cactus family. Dragon fruit has the characteristics of short childhood, long flowering and fruiting period, less pests and diseases in production, almost no use of pesticides, and large flower volume. Dragon fruit flower is rich in nutrition and has a wide range of medicinal ingredients. It has the functions of antibacterial, anti-inflammatory, clearing fire, moistening lung, relieving cough, enhancing immunity, lowering blood sugar, blood lipid, lowering blood pressure, anti-cancer, treating hyperuricemia, preventing constipation, etc. At the same time, it also has the functions of beautifying, nourishing the skin and delaying aging. [0003] Dragon fruit not only tastes sweet, but also has high nutrition...

AI Technical Summary

Problems solved by technology

[0005] At present, the extraction process of dragon fruit mostly stays on hot water extraction method, alcohol extraction method, etc. These extraction methods will have a certain impact on the biological activity of polysaccharides. Therefore, in order to avoid reducing the biological activity of polysaccharides, this application provides A fast, simple, safe, low-cost and non-destructive extraction method