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Microwave extraction method for purple cabbage haematochrome

An extraction method and technology of purple cabbage, applied to chemical instruments and methods, azo dyes, organic dyes, etc., can solve the problems of microwave extraction method of purple cabbage pigment that has not been reported yet, and achieve simple steps and high anthocyanin content , time-consuming effect

Inactive Publication Date: 2011-05-11
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of microwave technology to extract natural pigments has made some research progress in the aspects of orange yellow pigment, roselle red pigment, persimmon red pigment, etc., but so far, there has been no report on the microwave extraction method of purple cabbage pigment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Weigh 10g of fresh purple cabbage, cut it into 0.2cm×0.2cm pieces, add 100ml of 0.35mol / L hydrochloric acid and soak for 30 minutes, put it in a microwave oven, control the microwave power at 900W, heat for 120 seconds, take it out, cool and filter , repeating the operation twice, the extract was concentrated under reduced pressure, purified by macroporous resin, washed with water and eluted with 30% ethanol, the eluate was concentrated and dried under reduced pressure to obtain the purple cabbage pigment product.

Embodiment 2

[0009] Weigh 10g of dried purple cabbage, crush it, pass through a 60-mesh sieve, add 200ml of 0.35mol / L hydrochloric acid and soak for 30 minutes, put it in a microwave oven, control the microwave power at 900W, heat for 120 seconds, take it out, cool and filter, repeat the operation two times Second, the extract was concentrated under reduced pressure, purified by macroporous resin, washed with water and eluted with 50% ethanol, and the eluate was concentrated and dried under reduced pressure to obtain the purple cabbage pigment product.

Embodiment 3

[0011] Weigh 10kg of fresh purple cabbage, crush it with a crusher, add 150L of 0.35mol / L hydrochloric acid and soak for 60 minutes, put it in a microwave oven, control the microwave power at 900W, heat for 150 seconds, take it out and filter it, and concentrate the extract under reduced pressure Afterwards, it is purified by macroporous resin, washed with water and eluted with 30% ethanol, and the eluate is concentrated and dried under reduced pressure to obtain the purple cabbage pigment product.

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PUM

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Abstract

The invention discloses a microwave method for extracting red cabbage pigment, comprising the following steps that: purple cabbage is dried and crushed into 40 to 100 meshes, hydrochloric acid with a concentration between 0.20 and 0.50mol / L is added into the purple cabbage powder according to the solid-to-liquid ratio of between 1 to 8 and 1 to 20, the purple cabbage powder is immersed in the hydrochloric acid for 30 to 60 minutes, the microwave power is controlled to between 600 and 900W, the mixture is heated for 80 to 150 seconds, the product is taken out, cooled and filtered, the process is repeated for twice; the extracting solution is decompressed and condensed as well as is purified by a macroporous resin, is washed by water and is eluted by 30 to 70 percent ethanol; and the eluting solution is decompressed, condensed and dried so that the purple cabbage pigment product is prepared. The method has simple steps, and convenient and simple operation, accelerates the dissolution ofthe effective components by using microwave to heat, combines the macroporous resin to separate and purify, is not time-consuming and has high extracting efficiency. The obtained pigment product has high content of anthocyanin and good stability.

Description

technical field [0001] The invention relates to a method for extracting natural pigment, in particular to a microwave extraction method for purple cabbage red pigment. Background technique [0002] As an important food additive, natural pigments are not only widely used in beverages, candies, cakes, wines and other leisure foods, they have the characteristics of high safety, natural and bright colors, and some natural pigments are also effective in preventing and treating various diseases of the human body. Pharmacological effects and health care functions such as treatment. At present, the production of natural pigments is still dominated by traditional direct extraction. Traditional extraction methods mainly include: solvent leaching, pressing, and filtration. Poor, high production costs and other defects. Microwave extraction technology uses microwave energy to heat up the internal temperature of the substance in a short period of time to promote the dissolution of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B61/00
Inventor 张会香杨世军
Owner GUILIN UNIVERSITY OF TECHNOLOGY