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Extraction method of date peel cyanidin

An extraction method and anthocyanin technology, which are applied in the field of jujube peel anthocyanin extraction, can solve the problems of low extraction rate and poor stability of natural anthocyanins, and achieve the effects of simple process, low production cost and strong operability

Inactive Publication Date: 2013-10-02
LULIANG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of poor stability and low extraction rate of natural anthocyanins, the present invention provides a method for extracting anthocyanins from jujube peel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for extracting jujube bark anthocyanins, comprising the following steps:

[0022] Dried jujube skins are crushed and sieved with a 20 (or 30 or 40 or 50 or 60) mesh screen;

[0023] Add jujube skin powder and pure water into the container according to the solid-liquid mass ratio of 1:15 (or 18 or 21 or 23 or 25);

[0024] In the above solution, the volume ratio of the solution to the enzyme is 90 (or 95 or 100 or 105 or 110): 1, and the concentration is 1 (or 1.5 or 2 or 2.5 or 3)% red jujube special compound enzyme, and the pH of the solution Adjust the value to 5 (or 5.5 or 6 or 6.5 or 7) and shake at a constant temperature of 40 (or 44 or 48 or 52 or 55) ℃ for 17 (or 17.5 or 18 or 18.5 or 19) h;

[0025] Add a sodium hydroxide solution with a concentration of 2 (or 2.5 or 3 or 3.5 or 4)% to the solution after enzymolysis, and the volume ratio of the added sodium hydroxide solution to the solution after enzymolysis is 0.4 (or 0.45 or 0.5 or 0.55 or 0.6): 1;...

Embodiment 2

[0029] A method for extracting jujube bark anthocyanins, comprising the following steps:

[0030] Dried jujube skins are crushed and sieved with a 20 (or 30 or 40 or 50 or 60) mesh screen;

[0031] Add jujube skin powder and pure water into the container according to the solid-liquid mass ratio of 1:15 (or 18 or 21 or 23 or 25);

[0032] In the above solution, the volume ratio of the solution to the enzyme is 90 (or 95 or 100 or 105 or 110): 1, and the concentration is 1 (or 1.5 or 2 or 2.5 or 3)% red jujube special compound enzyme, and the pH of the solution Adjust the value to 5 (or 5.5 or 6 or 6.5 or 7) and shake at a constant temperature of 40 (or 44 or 48 or 52 or 55) ℃ for 17 (or 17.5 or 18 or 18.5 or 19) h;

[0033] Put the enzymolysis solution on a combined microwave-ultrasonic extractor, set the microwave power to 100 (or 150 or 180 or 200 or 250) W, and set the ultrasonic frequency to 20 (or 22 or 24 or 26 or 30) KHz. The power is set to 900 (or 1000 or 1100 or 120...

Embodiment 3

[0038] A method for extracting jujube bark anthocyanins, comprising the following steps:

[0039] Dried jujube skins are crushed and sieved with a 20 (or 30 or 40 or 50 or 60) mesh screen;

[0040]Add jujube skin powder and pure water into the container according to the solid-liquid mass ratio of 1:15 (or 18 or 21 or 23 or 25);

[0041] In the above solution, the volume ratio of the solution to the enzyme is 90 (or 95 or 100 or 105 or 110): 1, and the concentration is 1 (or 1.5 or 2 or 2.5 or 3)% red jujube special compound enzyme, and the pH of the solution Adjust the value to 5 (or 5.5 or 6 or 6.5 or 7) and shake at a constant temperature of 40 (or 44 or 48 or 52 or 55) ℃ for 17 (or 17.5 or 18 or 18.5 or 19) h;

[0042] Put the enzymolysis solution on a combined microwave-ultrasonic extractor, set the microwave power to 100 (or 150 or 180 or 200 or 250) W, and set the ultrasonic frequency to 20 (or 22 or 24 or 26 or 30) KHz. The power is set to 900 (or 1000 or 1100 or 1200...

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Abstract

The invention relates to preparation of cyanidin, particularly an extraction method of date peel cyanidin, which comprises the following steps: drying date peel, pulverizing, and screening with a 20-60-mesh sieve; adding the date peel powder and pure water into a vessel according to a solid-liquid mass ratio of 1:(15-25); adding 1-3% special composite enzyme for dates into the vessel until the pH value of the solution is regulated to 5-7, and oscillating the solution for 17-19 hours at the constant temperature of 40-60 DEG C; adding a 2-4% sodium hydroxide solution into the enzymolyzed solution, wherein the volume ratio of the added sodium hydroxide solution to the enzymolyzed solution is (0.4-0.6):1; centrifuging the sodium-hydroxide-added solution 2-4 times, filtering out impurities, and collecting the supernatant; and adding 0.5-2.5% vitamin A or vitamin B6 into an ethanol-added solution, wherein the volume ratio of the vitamin A or vitamin B6 to the ethanol-added solution is 1:(8-16). The invention solves the problems of poor stability and low extraction rate of natural cyanidin, and has the advantages of low production cost, simple technique, strong operability and huge economic benefit.

Description

technical field [0001] The invention relates to the preparation of anthocyanins, in particular to a method for extracting anthocyanins from jujube peel. Background technique [0002] At present, the anthocyanin pigments that have been developed and applied in the world include peanut red pigment, falling sunflower red, black currant red, natural amaranth, purple corn pigment, mulberry red pigment, red rice red (black rice red), perilla Pigments, red cabbage pigments, blue berry red, these pigments are all synthetic pigments, except for the use of red cabbage pigment, perilla pigment, blue berry red, and purple corn pigment, which have not been approved in China, other pigments have been approved. Synthetic pigments are almost all toxic to varying degrees, so natural pigments are now attracting more and more attention in the field of scientific research, but compared with synthetic pigments, natural anthocyanin pigments have some defects, natural anthocyanins There is a high...

Claims

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Application Information

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IPC IPC(8): C07D311/62
Inventor 杨卫民于艳琴高晓丽闫艳华赵君杜京旗
Owner LULIANG UNIV
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