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Method for extracting total flavonoids from litchi shells

A technology of lychee shell and total flavonoids, which is applied in the direction of pharmaceutical formulations, medical preparations containing active ingredients, anti-toxins, etc., can solve the problems of long extraction time, troublesome operation, and different degrees of toxicity of solvents, and achieve low cost and simple process , Antioxidant effect is remarkable

Inactive Publication Date: 2016-01-13
谢镜国
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In response to this phenomenon, Chinese patent CN201010293235.6 discloses a method for purifying lychee flavonoids, but it has disadvantages such as troublesome operation, long extraction time, and different degrees of toxicity of solvents.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for extracting total flavonoids from litchi shells, comprising the following steps:

[0022] (1) Pretreatment: Take discarded litchi shells and dry them at 100°C, weigh 1000g, crush them, and pass through a 100-mesh sieve;

[0023] (2) Extraction: Ethanol was added to the crushed litchi shell powder, and litchi flavonoids were extracted with the aid of ultrasonic waves. The ultrasonic power is 260W, the amount of ethanol added is 26 times the weight of litchi powder, the extraction time is 24min, the extraction temperature is 75°C, and the volume fraction of ethanol is 49%;

[0024] (3) Centrifugation and concentration: Centrifuge it after the extraction, remove the precipitated part to obtain the supernatant, and evaporate and concentrate the supernatant part after filtration;

[0025] (4) Purification and drying: the concentrated solution is purified through a pretreated macroporous adsorption resin column, washed with water, and then eluted with an eluent, ...

Embodiment 2

[0027] A method for extracting total flavonoids from litchi shells, comprising the following steps:

[0028] (1) Pretreatment: Take discarded litchi shells and dry them at 60°C, weigh 1000g, crush them, and pass through a 120-mesh sieve;

[0029] (2) Extraction: Ethanol was added to the crushed litchi shell powder, and litchi flavonoids were extracted with the aid of ultrasonic waves. The ultrasonic power is 200W, the amount of ethanol added is 24 times the weight of litchi powder, the extraction time is 18min, the extraction temperature is 70°C, and the volume fraction of ethanol is 45%;

[0030] (3) Centrifugation and concentration: Centrifuge it after the extraction, remove the precipitated part to obtain the supernatant, and evaporate and concentrate the supernatant part after filtration;

[0031] (4) Purification and drying: the concentrated solution is purified through a pretreated macroporous adsorption resin column, washed with water, and then eluted with an eluent, a...

Embodiment 3

[0033] A method for extracting total flavonoids from litchi shells, comprising the following steps:

[0034] (1) Pretreatment: Take discarded litchi shells and dry them at 80°C, weigh 1000g, crush them, and pass through an 80-mesh sieve;

[0035] (2) Extraction: Ethanol was added to the crushed litchi shell powder, and litchi flavonoids were extracted with the aid of ultrasonic waves. The ultrasonic power is 280W, the amount of ethanol added is 30 times the weight of litchi powder, the extraction time is 30min, the extraction temperature is 80°C, and the volume fraction of ethanol is 60%;

[0036] (3) Centrifugation and concentration: Centrifuge it after the extraction, remove the precipitated part to obtain the supernatant, and evaporate and concentrate the supernatant part after filtration;

[0037] (4) Purification and drying: the concentrated solution is purified through a pretreated macroporous adsorption resin column, washed with water, and then eluted with an eluent, a...

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Abstract

The invention relates to a method for extracting total flavonoids from litchi shells, and belongs to the technical field of food processing. The method comprises the steps that 1, pretreatment is conducted, wherein discarded litchi shells are selected to be dried, weighed, smashed and screened; 2, extraction is conducted, wherein ethyl alcohol is added to the smashed litchi shell powder, and litchi flavonoids are extracted through ultrasonic assistance; 3, centrifugation and concentration are conducted, wherein after extraction is completed, centrifugation is conducted on the extracted litchi flavonoids, the precipitation part is removed, supernatant is obtained, and evaporation concentration is conducted after the supernatant is filtered; 4, purification and drying are conducted, wherein concentrated liquor is adsorbed through a resin column and eluted through eluent, the eluent is collected, and the litchi flavonoids are obtained after drying is conducted. It is detected that the content of the litchi flavonoids is not lower than 80 percent. By means of the method for extracting the total flavonoids from the litchi shells, recycling of the discarded litchi shells is achieved, economic income can be increased, and a wide market prospect is achieved.

Description

technical field [0001] The invention relates to a method for extracting total flavonoids from litchi shells, belonging to the technical field of natural product extraction. Background technique [0002] Litchi is a Sapindaceae plant, and it is a famous and high-quality fruit in the tropics and subtropics. It is planted in large quantities in Guangdong, Guangxi, Fujian, Taiwan, Hainan and other provinces in my country, and the output is very high. In addition to being eaten directly, lychee meat is often processed into canned lychee, lychee wine or lychee drinks. The lychee shells peeled off during the processing are usually disposed of as garbage, causing a lot of waste. In fact, lychee shell contains a variety of active ingredients, such as flavonoids, phenols and polysaccharides, which have high medicinal value. Among them, the total flavonoids have biopharmacological activities such as anti-oxidation, anti-inflammation, anti-mutagenesis, and anti-tumor; especially the fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K36/77A61P39/06
Inventor 谢镜国
Owner 谢镜国
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