Method for extracting dragon fruit flower polysaccharide

A technology of pitaya flowers and polysaccharides, applied in the field of polysaccharide extraction technology, to achieve the effects of shortened extraction time, significant biological activity, and low cost

Inactive Publication Date: 2014-05-07
INST OF AGRI ENG TECH FUJIAN ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0011] Example 1

[0012] Combining the ultrasonic extraction and hot water extraction process, the ultrasonic power is 160W, the material-to-water ratio is 1:35, the ultrasonic time is 40 minutes, and the supernatant is obtained by centrifugation and ethanol precipitation to obtain the dragon fruit flower polysaccharide.

Example Embodiment

[0013] Example 2

[0014] Combining the ultrasonic extraction and hot water extraction process, the ultrasonic power is 180W, the material-to-water ratio is 1:45, the ultrasonic time is 50min, and the supernatant is obtained by centrifugation in a water bath at 90°C for 2h. The supernatant is obtained by ethanol precipitation to obtain dragon fruit flower polysaccharide.

Example Embodiment

[0015] Example 3

[0016] Combining the ultrasonic extraction and hot water extraction process, the ultrasonic power is 170W, the material-water ratio is 1:40, the ultrasonic time is 45min, and the supernatant is obtained by centrifugation in a water bath at 90°C for 1.5 h. The supernatant is obtained by centrifugation and ethanol precipitation is performed to obtain dragon fruit flower polysaccharide.

[0017] Compared with the single hot water extraction method, the method implemented in the above embodiments shortened the extraction time by more than 35.0%, the extraction yield increased by 29.1%, and the polysaccharide extraction rate was 7.21%. The pitaya flower polysaccharide extracted by this method has significant biological activity. The total antioxidant capacity of the 1mg / ml pitaya flower polysaccharide solution reaches 5.21 U / ml and the hydroxyl radical scavenging capacity is 2188.78 U / ml.

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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...

Claims

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Application Information

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IPC IPC(8): C08B37/00
Inventor 高慧颖
Owner INST OF AGRI ENG TECH FUJIAN ACAD OF AGRI SCI
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