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Method for extracting pigments in eleocharis tuberose peel

An extraction method and water chestnut bark technology are applied in the field of extracting pigments in water chestnut bark, which can solve the problems such as inability to release brown pigment of water chestnut bark, and achieve the effects of improving dissolution rate and dissolution rate.

Active Publication Date: 2013-05-08
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the brown pigment in the water chestnut skin cannot be released in the prior art, the embodiment of the present invention provides a method for extracting the pigment in the water chestnut skin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Compared with the control example, the embodiment of the present invention increases double enzymatic hydrolysis steps, specifically as follows:

[0033] After washing and drying the water chestnut skin and pulverizing it to obtain water chestnut skin powder, pass through a 40-mesh sieve, take 20g of the sieved water chestnut skin powder and put it in an extraction bottle, add 200mL of ethanol solution with a concentration of 50%, and then add cellulose Enzyme and pectinase, wherein, the consumption of cellulase is 0.008% of the weight of water chestnut skin powder, the consumption of pectinase is 0.03% of the weight of water chestnut skin powder, stir evenly, adjust the pH value of the solution to 2, at a temperature of 35°C Then, the microwave-assisted extraction of the pigment was continued, wherein the reaction power was 200W, and the reaction time was 6min. The extracted product was filtered to obtain the primary separated filtrate and filter residue, and the filter...

Embodiment 2

[0035] Compared with the control example, the embodiment of the present invention increases double enzymatic hydrolysis steps, specifically as follows:

[0036]After washing and drying the water chestnut skin and crushing it to obtain water chestnut skin powder, pass through a 60-mesh sieve, take 15g of the sieved water chestnut skin powder and put it in an extraction bottle, add 270mL of ethanol solution with a concentration of 70%, and then add cellulose Enzyme and pectinase, wherein, the consumption of cellulase is 0.01% of the weight of water chestnut skin powder, the consumption of pectinase is 0.01% of the weight of water chestnut skin powder, stir evenly, adjust the pH value of the solution to 3, at a temperature of 45°C 2 hours, and then continue to carry out microwave-assisted extraction of pigments, wherein the reaction power is 280W, the reaction time is 4min, filter the extracted product, obtain the primary separated filtrate and filter residue, and use the concentr...

Embodiment 3

[0038] Compared with the control example, the embodiment of the present invention increases double enzymatic hydrolysis steps, specifically as follows:

[0039] After washing and drying the water chestnut skin and crushing it to obtain water chestnut skin powder, pass through a 100-mesh sieve, take 25g of the sieved water chestnut skin powder and put it in an extraction bottle, add 750mL of ethanol solution with a concentration of 40%, and then add cellulose Enzyme and pectinase, wherein, the consumption of cellulase is 0.03% of the weight of water chestnut skin powder, the consumption of pectinase is 0.008% of the weight of water chestnut skin powder, stir evenly, adjust the pH value of the solution to 4, at a temperature of 50°C 3 hours under enzymatic hydrolysis, and then continue to carry out microwave-assisted extraction of pigments, wherein the reaction power is 400W, the reaction time is 2min, and the extracted product is filtered to obtain the primary separated filtrate...

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Abstract

The invention discloses a method for extracting pigments in eleocharis tuberose peel and belongs to the field of extraction of natural pigments. The method for extracting the pigments in the eleocharis tuberose peel comprises the following steps of: firstly drying and smashing the eleocharis tuberose peel to obtain eleocharis tuberose peel powder, and dissolving the eleocharis tuberose peel into an ethanol solution; secondly, adding cellulose and pectinase to carry out enzymolysis, and filtering the obtained products after the enzymolysis, so that primarily extracted filter residue is obtained; and thirdly, carrying out vacuum drying on primarily separated filtrate, so that powdery brown pigment is obtained. According to the method for extracting the pigments in the eleocharis tuberose peel, double enzymolysis is carried out on the eleocharis tuberose peel by adopting the cellulase and pectinase, and dissolution rate and leaching rate of the pigments in the eleocharis tuberose peel are increased.

Description

technical field [0001] The invention relates to the field of extraction of natural pigments, in particular to a method for extracting pigments from water chestnut skins. Background technique [0002] Water chestnut (Eleochairis tuberosa), commonly known as Water chestnut, is the underground corm of perennial aquatic herbaceous plants in Cyperaceae, and is a common natural economic crop. More than 95% of the world's water chestnuts are distributed in all provinces south of the Yangtze River Basin in my country. A large number of water chestnuts are used as food for deep processing, and a large number of discarded water chestnut skins are produced in the processing process. -25%, a lot of water chestnut skins are thrown away, which not only wastes resources, but also causes environmental pollution. [0003] In the prior art, in order to solve this problem, discarded water chestnut skins are reused, and natural pigments are extracted from water chestnut skins. There are many ext...

Claims

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Application Information

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IPC IPC(8): C09B61/00
Inventor 郭艳华李艾华许国权张玉敏余凡
Owner JIANGHAN UNIVERSITY
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