Method for extracting red jujube polyphenol

An extraction method and red date technology are applied in the field of polyphenol extraction using red date peels and/or jujube pits as raw materials, can solve the problem of difficulty in extracting polyphenols and the like, and achieve a simple and easy extraction method, high safety, The effect of high product extraction rate

Inactive Publication Date: 2014-08-06
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyphenols, especially phenolic acids, often exist in free and bound forms in plants. In order to explore the existing forms and distribution of phenolic acids in jujube, the total phenolics in free and bound parts in jujube skin and jujube core were respectively determined. content, it was found that jujube skin and jujube core mainly exist in the bound state, and it is in a methanol-insoluble bound state. Therefore, it is difficult to extract the polyphenols in this part with methanol or ethanol

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027] Red jujube jujube skin and jujube core are broken and packed into a container, and a 4mol / L NaOH solution (containing 1% Vc and 10mmol / L EDTA) is added in a ratio of 1:10 (w / v) by the solid-to-liquid ratio, and filled into the container Seal the container after nitrogen gas; process the container in an ultrasonic water bath for 30 minutes, transfer it to a shaker at 25°C for 6 hours; The volume of ethyl acetate was extracted several times until the ethyl acetate phase was colorless, and the ethyl acetate phase was combined; then the ethyl acetate phase was removed under reduced pressure and concentration at a temperature lower than 40°C. esters, the jujube polyphenol extract can be obtained.

example 2

[0029] Red jujube jujube skin and jujube core are broken and packed into a container, and the ratio of solid to liquid is 1:15 (w / v) to add 2mol / LNaOH solution (containing 1% Vc and 10mmol / L EDTA), and fill the container with nitrogen After sealing; treat the container in an ultrasonic water bath for 30 minutes, then transfer to a shaker at 25°C for 6 hours; Ethyl acetate was extracted several times until the ethyl acetate phase was colorless, the ethyl acetate phases were combined, and the ethyl acetate in the ethyl acetate phase was removed under reduced pressure and concentration at a temperature lower than 40°C. The jujube polyphenol extract can be obtained.

example 3

[0031] Red jujube jujube skin and jujube core are broken and packed into a container, and a 4mol / L NaOH solution (containing 1% Vc and 10mmol / L EDTA) is added in a ratio of 1:15 (w / v) by the solid-to-liquid ratio, and filled into the container After nitrogen gas, seal the container, then treat the container in an ultrasonic water bath for 30 minutes, transfer to a shaker at 25°C for 4 hours; Equal volume of ethyl acetate was extracted several times until the ethyl acetate phase was colorless, and the ethyl acetate phase was combined; under reduced pressure and concentration, the acetic acid in the ethyl acetate phase was removed at a temperature lower than 40°C Ethyl ester can be obtained jujube polyphenol extract.

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Abstract

A method for extracting red jujube polyphenol comprises the following steps: 1) crushing red jujube peels and/or jujube pi to be put into a closed container, adding a 2-4 mol/L NaOH mixed solution comprising 1% of Vc in mass ratio and 10 mmol/L EDTA according to the solid-to-liquid ratio of 1:(10-15) (w/v) to form a reaction liquid, filling nitrogen gas in the container, and then sealing; 2) transferring the sealed container into a shaking table at the temperature of 25 DEG C to shake; 3) unsealing the sealed container, quickly adjusting the pH value of the reaction liquid in the container to be 2.0 through 6 mol/L HCl; conducting repeated extraction through ethyl acetate with the same volume as the reaction liquid till ethyl acetate phase is colorless, and collecting and combining the ethyl acetate phase; 5) evaporating under the condition of decompressing and condensing at the temperature of not larger than 40 DEG C to remove ethyl acetate in the ethyl acetate phase so as to obtain a red jujube polyphenol extractive. The method for extracting the red jujube polyphenol is simple in process and high in extraction ratio.

Description

technical field [0001] The invention relates to a method for extracting polyphenols from jujubes, in particular to a method for extracting polyphenols from jujube peels and / or pits. Background technique [0002] Jujube is a unique fruit resource in my country. It has a history of thousands of years of cultivation in China. More than 700 varieties have been developed. It is widely used as food, health food and Chinese medicinal materials. It is a recognized nutritional health product and medicinal food It is also used as a fruit, integrating nutrition, health care and medicinal functions. Jujube is rich in nutrients. In addition to sugar, protein, fatty acid, vitamins, trace elements and other nutrients, it also contains medicinal ingredients such as triterpenoids, flavonoids and phenolic acids. It has the functions of strengthening the spleen and stomach, Nourish the heart and calm the nerves, promote blood circulation and regulate menstruation, reduce inflammation and relie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L1/30
CPCA23L5/32A23L19/09A23V2002/00A23V2250/2132A23V2300/28A23V2300/48A23V2300/50
Inventor 王毕妮黄庆瑗高慧曹炜程妮
Owner NORTHWEST UNIV(CN)
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