Extraction process and application of grape skin pigment

A grape skin pigment and extraction process technology, applied in the field of natural pigment extraction, can solve problems such as toxicity, diarrhea, and carcinogenicity, and achieve the effects of pure color, high extraction efficiency and low production equipment requirements.

Inactive Publication Date: 2015-03-11
胡红慧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Synthetic pigments are low in cost, bright in color, strong in tinting power, and stable to light, heat, oxyge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of extraction process of grape skin pigment is realized through the following steps:

[0021] (1) Drying: Dry the grape skins under vacuum conditions at 30°C to constant weight, and put them in a desiccator for later use;

[0022] (2) crushing: put the dried grape skins into a crusher for crushing, then cross an 80-mesh sieve;

[0023] (3) Extraction: Add ethanol to the crushed grape skins (grape skin: extractant = 1:7 (g / mL)), add citric acid to adjust the pH of the solution to 3, and extract in a water bath for 68 minutes , the temperature is 72°C, and then filtered;

[0024] (4) concentrated drying: the filtrate is concentrated and the extractant is recovered, and the pigment coarse powder is obtained after drying;

[0025] (5) Purification: the extracted pigment is separated and purified by silica gel column chromatography.

Embodiment 2

[0027] A kind of extraction process of grape skin pigment is realized through the following steps:

[0028] (1) Drying: Dry the grape skins under vacuum conditions at 45°C to constant weight, and put them in a desiccator for later use;

[0029] (2) crushing: put the dried grape skins into a crusher for crushing, then cross a 100-mesh sieve;

[0030] (3) Extraction: Add ethanol to the crushed grape skins (grape skin: extractant = 1:7 (g / mL)), add citric acid to adjust the pH of the solution to 3, and extract in a water bath for 70 minutes , the temperature is 70°C, and then filtered;

[0031] (4) concentrated drying: the filtrate is concentrated and the extractant is recovered, and the pigment coarse powder is obtained after drying;

[0032] (5) Purification: the extracted pigment is separated and purified by silica gel column chromatography.

Embodiment 3

[0034] A kind of extraction process of grape skin pigment is realized through the following steps:

[0035] (1) Drying: dry the grape skins under vacuum conditions at 60°C to constant weight, and put them in a desiccator for later use;

[0036] (2) crushing: put the dried grape skins into a crusher for crushing, then cross a 120-mesh sieve;

[0037] (3) Extraction: Add ethanol to the crushed grape skins (grape skin: extractant = 1:7 (g / mL)), add citric acid to adjust the pH of the solution to 3, and extract in a water bath for 72 minutes , the temperature is 68°C, and then filtered;

[0038] (4) concentrated drying: the filtrate is concentrated and the extractant is recovered, and the pigment coarse powder is obtained after drying;

[0039] (5) Purification: the extracted pigment is separated and purified by silica gel column chromatography.

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PUM

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Abstract

The invention discloses an extraction process of a grape skin pigment. The extraction process comprises the steps of: drying; crushing; extraction; concentration and drying; and purification. The extraction process provided by the invention is characterized by simple extraction technology, low requirements for production equipment, high extraction efficiency and short extraction time, and is superior to traditional technologies. The extracted red pigment is natural and pure green, has stable character and pure color, can be widely used in food processing and other industries, and is of far-reaching significance for improving the food safety of people.

Description

technical field [0001] The invention belongs to the technical field of extraction of natural pigments, and in particular relates to an extraction process and application of grape skin pigments. Background technique [0002] Food coloring is an indispensable additive in the food industry. Food coloring includes synthetic coloring and natural coloring. Synthetic pigments are low in cost, bright in color, strong in coloring power, and stable to light, heat, oxygen, and pH, but they have a major disadvantage, that is, they are toxic, including toxicity, diarrhea, and carcinogenicity. These toxicity originate from arsenic, lead, copper, phenol, aniline, ether, chloride and sulfate in synthetic pigments, which can cause different degrees of harm to the human body. Most of the natural pigments are taken from plants, and some are taken from animals and minerals. The emergence of natural pigments, the development direction of natural pigments. Plants, parts obtained from animals ...

Claims

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Application Information

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IPC IPC(8): C09B61/00C09B67/54A23L1/275A23L1/29A23L5/43
CPCC09B61/00
Inventor 胡红慧
Owner 胡红慧
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