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A kind of method for extracting purple potato pigment from purple potato

A technology of purple potato pigment and extraction method, which is applied in the fields of chemical instruments and methods, organic chemistry, organic dyes, etc., and can solve the problems of low extraction rate of purple potato pigment and affecting the quality of purple potato pigment products, etc.

Active Publication Date: 2019-06-21
南京恒舟科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another common extraction method is simple solvent extraction. This extraction method is simple in process, but the extraction rate of purple potato pigment is low. Usually, microwave, ultrasonic and other methods are used to increase the yield of purple potato pigment.
In addition, in order to improve the purity of purple potato pigment products, existing surfactants are usually used, which will bring synthetic chemicals into the product, which will affect the quality of purple potato pigment products

Method used

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  • A kind of method for extracting purple potato pigment from purple potato
  • A kind of method for extracting purple potato pigment from purple potato

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Embodiment 1: Extract purple sweet potato pigment from purple sweet potato

[0076] The implementation steps of this embodiment are as follows:

[0077] A. Pretreatment

[0078] Dried purple sweet potato is crushed and sieved to collect purple sweet potato powder with a particle size of 60 mesh, and then add purple sweet potato powder to distilled water according to the ratio of purple sweet potato in grams to distilled water in ml of 2.4:15, and mix evenly to obtain purple sweet potato powder. Potato solution;

[0079] B. Enzyme hydrolysis

[0080] According to the ratio of pectinase and cellulase in grams to purple potato powder in grams, each is 0.015:2.5, the enzyme activity is 1.0×10 4 U / g pectinase and enzyme activity 2.0×10 5 Add U / g cellulase to the purple sweet potato aqueous solution obtained in step A at the same time, mix well, use 0.2mol / L hydrochloric acid aqueous solution to adjust the pH of the solution to 5.6, and then carry out enzymatic hydrolysis...

Embodiment 2

[0085] Embodiment 2: Extract purple sweet potato pigment from purple sweet potato

[0086] The implementation steps of this embodiment are as follows:

[0087] A. Pretreatment

[0088] Dried purple sweet potato is crushed and sieved to collect purple sweet potato powder with a particle size of 80 mesh, and then according to the ratio of purple sweet potato in grams to distilled water in ml is 2.3:15, add purple sweet potato powder to distilled water, mix evenly, and obtain purple sweet potato powder. Potato solution;

[0089] B. Enzyme hydrolysis

[0090] According to the ratio of pectinase and cellulase in grams to purple potato powder in grams, each is 0.020:2.5, the enzyme activity is 1.3×10 4 U / g pectinase and enzyme activity 1.8×10 5 Add U / g cellulase to the purple sweet potato aqueous solution obtained in step A at the same time, mix well, use 0.8mol / L sulfuric acid to adjust the pH of the solution to 5.2, and then carry out enzymatic hydrolysis at a temperature of 5...

Embodiment 3

[0095] Embodiment 3: Extract purple sweet potato pigment from purple sweet potato

[0096] The implementation steps of this embodiment are as follows:

[0097] A. Pretreatment

[0098] Dried purple sweet potato is crushed and sieved to collect purple sweet potato powder with a particle size of 60 mesh, and then add purple sweet potato powder to distilled water according to the ratio of purple sweet potato in grams to distilled water in ml of 2.8:15, and mix evenly to obtain purple sweet potato powder. Potato solution;

[0099] B. Enzyme hydrolysis

[0100] According to the ratio of pectinase in grams to purple potato powder in grams is 0.030:2.5, the enzyme activity is 1.7×10 4 Add U / g pectinase to the purple sweet potato aqueous solution obtained in step A, mix well, use 1.0mol / L phosphoric acid to adjust the pH of the solution to 3.8, and then perform enzymatic hydrolysis at a temperature of 56°C for 2.0h; use this manual Measured by the assay method described in, the pe...

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Abstract

The invention relates to a method for extracting purple sweet potato pigment from purple sweet potatoes. The method comprises the steps of pre-treatment, enzyme hydrolysis, extraction and the like. Through the method for extracting the purple sweet potato pigment from the purple sweet potatoes, the extraction rate of total purple sweet potato pigment is 320-360mg / 100g. Compared with a purple sweet potato pigment providing process without biological enzyme treatment, the method has the advantage that the extraction rate is increased by 9.5-30 percent. According to the method for extracting the purple sweet potato pigment, no surfactant is used, and no microwave or ultrasonic technology is adopted, so that the obtained product is stable and reliable, the technological process is simple, and convenience is brought to large-scale production of the purple sweet potato pigment.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of food processing. More specifically, the present invention relates to a method for extracting purple sweet potato pigment from purple sweet potato. [0003] 【Background technique】 [0004] Purple sweet potato is rich in purple sweet potato pigment, purple sweet potato pigment is a natural red pigment, which belongs to anthocyanin pigment, it is a compound formed by combining anthocyanin and glycoside by glycosidic bond The glycosides are mainly glucoside, arabinoside, xyloside, galactoside and disaccharides or trisaccharides composed of these monosaccharides. Purple sweet potato pigment has significant antioxidant effect, and its free radical scavenging ability is 20 times that of vitamin C and 50 times that of vitamin E. Purple potato pigment has strong thermal stability and can withstand high temperature treatment in the food industry, and it is a water-soluble pigment, so it can be used in foo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D311/62C09B61/00
CPCC07D311/62C09B61/00
Inventor 朱瑞艳赵颖刘志伟张晓宇武晓英宋颖颖
Owner 南京恒舟科技有限公司