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Method for extracting total flavonoids from psidium guajava leaves

A technology of guava leaves and total flavonoids, which is applied in the field of extracting guava leaves total flavonoids by using surfactants in conjunction with microwave-ultrasonic waves, can solve the problems of inconspicuous extraction rate, improve extraction efficiency, use simple and simple equipment, and reduce thermal decomposition and the effect of the degree of oxidation

Active Publication Date: 2017-09-01
广东番石榴健康产业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the traditional solvent extraction method, although the ultrasonic extraction method and the microwave extraction method can improve the extraction rate of flavonoids, the increase in the extraction rate is not obvious

Method used

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  • Method for extracting total flavonoids from psidium guajava leaves

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Embodiment 1

[0056] A method for extracting total flavonoids from guava leaves with surfactants in conjunction with microwave-ultrasonic waves, comprising the following steps: 1) placing fresh guava leaves in an electric heating constant temperature drying box, adjusting the temperature to 60°C, and drying at a constant temperature, when the water content is low At 2%, put it into a portable pulverizer, pulverize for 6 minutes, and pass through a 40-mesh sieve to obtain guava leaf pulverization;

[0057] 2) Accurately weigh 5 g of crushed guava leaves, and fully mix them with distilled water at a mass ratio of 1:30 to obtain a feed liquid;

[0058] 3) Add surfactant sodium lauryl sulfate to the mass ratio of Tween-80 in the feed liquid of step (2) to be 2:1, obtain mixed solution after mixing, and described mixed surfactant accounts for mixed surface active The mass percent of the agent aqueous solution is 2%;

[0059] 4) The mixed solution of step (3) is subjected to microwave-ultrasonic...

Embodiment 2

[0062] A method for extracting total flavonoids from guava leaves with surfactants in conjunction with microwave-ultrasonic waves, comprising the following steps: 1) placing fresh guava leaves in an electric heating constant temperature drying box, adjusting the temperature to 60°C, and drying at a constant temperature, when the water content is low At 2%, put it into a portable pulverizer, pulverize for 6 minutes, and pass through a 40-mesh sieve to obtain guava leaf pulverization;

[0063] 2) Accurately weigh 5 g of crushed guava leaves, and fully mix them with distilled water at a mass ratio of 1:30 to obtain a feed liquid;

[0064] 3) Add surfactant sodium lauryl sulfate to the mass ratio of Tween-80 in the feed liquid of step (2) to be 2:1, obtain mixed solution after mixing, and described mixed surfactant accounts for mixed surface active The mass percent of the agent aqueous solution is 2.5%;

[0065] 4) The mixed solution of step (3) is subjected to microwave-ultrason...

Embodiment 3

[0068] A method for extracting total flavonoids from guava leaves with surfactants in conjunction with microwave-ultrasonic waves, comprising the following steps: 1) placing fresh guava leaves in an electric heating constant temperature drying box, adjusting the temperature to 60°C, and drying at a constant temperature, when the water content is low At 2%, put it into a portable pulverizer, pulverize for 6 minutes, and pass through a 40-mesh sieve to obtain guava leaf pulverization;

[0069] 2) Accurately weigh 5 g of crushed guava leaves, and fully mix them with distilled water at a mass ratio of 1:30 to obtain a feed liquid;

[0070] 3) Add surfactant sodium lauryl sulfate to the mass ratio of Tween-80 in the feed liquid of step (2) to be 2:1, obtain mixed solution after mixing, and described mixed surfactant accounts for mixed surface active The mass percent of the agent aqueous solution is 3%;

[0071] 4) The mixed solution of step (3) is subjected to microwave-ultrasonic...

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Abstract

The invention discloses a method for extracting total flavonoids from psidium guajava leaves. The method is characterized by comprising the steps of putting the psidium guajava leaves in an aqueous solution of a surfactant, carrying out extraction under the assistance of microwaves and ultrasonics, and then, carrying out solid-liquid separation, thereby obtaining an extract containing the total flavonoids, wherein the mass percent of the surfactant in the aqueous solution of the surfactant is 1% to 3%, the microwave power is 100W to 150W, and the ultrasonic power is 600W to 650W. According the method, an organic solvent is replaced with an aqueous solution, and the wetting and solubilization actions of the surfactant, a bulk-heating principle of microwave extraction and an cavitation effect of the ultrasonics are fully combined, so that the traditional problem, i.e., organic solvent residue is solved, meanwhile, the extraction time can be greatly shortened, the extraction ratio is increased, the production cost of enterprises is reduced, and the method has a broad popularization prospect.

Description

technical field [0001] The invention relates to the field of extracting plant active components, in particular to a method for extracting total flavonoids from guava leaves by using a surfactant in cooperation with microwave-ultrasonic waves. Background technique [0002] Guava (Psidium guajava) is a plant of the genus Guava in the family Myrtaceae. It is native to tropical America and is distributed or cultivated in Fujian, Taiwan, Guangdong, Guangxi and other places in my country. Modern pharmacological research shows that guava leaves have obvious hypoglycemic, antiviral, antibacterial, antidiarrheal, antimalarial and other activities. In recent years, phytochemical studies have shown that the effective parts that can be extracted from guava leaves belong to total flavonoids, which have good hypoglycemic, antibacterial, blood circulation and blood stasis effects, so they have high development and utilization value. [0003] At present, the traditional extraction methods ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K36/61A61K127/00
CPCA61K36/61A61K2236/15A61K2236/17A61K2236/331
Inventor 郑增辉李交昆曾伟民廖创吴晨晨李芳余黄余润兰吴学玲申丽刘元东刘学端邱冠周
Owner 广东番石榴健康产业有限公司
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