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Method for purifying yellow pigment in yellow ginger

A purification method and a yellow pigment technology are applied in the field of yellow pigment purification in turmeric, and can solve the problems that the turmeric pigment cannot be well applied and the extraction efficiency is low.

Inactive Publication Date: 2010-08-04
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing technology of turmeric pigment extraction at present has: Tang Xuan (extraction process research of yellow pigment in turmeric) etc. adopts organic solvent to extract yellow pigment in turmeric; Yellow pigment and pigment stability were studied; the existing turmeric pigment extraction methods are all organic solvent extraction methods, the extraction efficiency is not high, and there are few reports on the separation and purification of turmeric pigment, so that turmeric pigment cannot be well extracted. application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: 1) Wash, slice, dry and pulverize the wet turmeric, add ethanol solution under constant temperature reflux at 70°C for extraction, remove ethanol by rotary evaporation, and dry to obtain the crude product of turmeric pigment, wherein the ratio of turmeric powder and ethanol solution is 1g: 27ml Add, the mass concentration of described ethanol solution is 52.8%;

[0018] 2) Prepare the crude pigment obtained in step 1) into 40mg / mL turmeric pigment solution, load the sample onto the activated LX-60 macroporous adsorption resin column and elute with 2 times the column volume of distilled water at a flow rate of 4mL / min Remove impurities, and then use 60% ethanol solution to elute 4 times the column volume at a flow rate of 1 mL / min;

[0019] 3) Concentrate and dry the obtained ethanol eluent to obtain a refined product of turmeric pigment with a pigment yield of 4.48% and a color value of 114.5.

Embodiment 2

[0020] Example 2: 1) Wash the wet turmeric, slice it, dry it and pulverize it, then add ethanol solution under constant temperature reflux at 70°C for extraction, remove ethanol by rotary evaporation, and dry to obtain the crude product of turmeric pigment, wherein the ratio of turmeric powder and ethanol solution is 1g: 27ml Add, the mass concentration of described ethanol solution is 52.8%;

[0021] 2) Prepare the crude pigment obtained in step 1) into 50 mg / mL turmeric pigment solution, load the sample onto the activated LX-10G macroporous adsorption resin column and elute with distilled water of 2 times the column volume at a flow rate of 1 mL / min Remove impurities, and then use 60% ethanol solution to elute 4 times the column volume at a flow rate of 3 mL / min;

[0022] 3) Concentrate and dry the obtained ethanol eluent to obtain a refined product of turmeric pigment with a pigment yield of 4.48% and a color value of 114.5.

Embodiment 3

[0023] Example 3: 1) Wash, slice, dry and pulverize the wet turmeric, add ethanol solution under constant temperature reflux at 70°C for extraction, remove ethanol by rotary evaporation, and dry to obtain the crude product of turmeric pigment, wherein the ratio of turmeric powder and ethanol solution is 1g: 27ml Add, the mass concentration of described ethanol solution is 52.8%;

[0024] 2) Prepare the crude pigment obtained in step 1) into a 60mg / mL turmeric pigment solution, load the sample onto the activated XDA-7 macroporous adsorption resin column and elute with distilled water of 2 times the column volume at a flow rate of 3mL / min Remove impurities, and then use 60% ethanol solution to elute 4 times the column volume at a flow rate of 2 mL / min;

[0025] 3) Concentrate and dry the obtained ethanol eluent to obtain a refined product of turmeric pigment with a pigment yield of 4.48% and a color value of 114.5.

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Abstract

The invention relates to a method for purifying yellow pigment in yellow ginger, comprising the following steps of scrubbing, slicing, drying and pulverizing wet yellow ginger; adding ethanol solution for extraction through reflux at constant temperature; removing ethanol by rotation and evaporation; drying to obtain a crude product of dioscorea zingiberensis pigment; preparing the crude product of dioscorea zingiberensis pigment into dioscorea zingiberensis pigment solution; enabling the dioscorea zingiberensis pigment solution to pass through a macroporous resin column, and eluting with distilled water to remove impurities ; carrying out elution with ethanol; and concentrating and drying the obtained ethanol eluent to obtain a refined product of dioscorea zingiberensis pigment. In the invention, the macroporous resin column is utilized to specifically absorb yellow pigment in yellow ginger, and elution is carried out by using ethanol so as to achieve the purpose of purifying dioscorea zingiberensis pigment. The method has the advantages of easy adsorption and desorption, large adsorption capacity and high color value of the product with the pigment yield rate of 4.48 percent and the color value of 114.5.

Description

technical field [0001] The invention relates to a purification method, in particular to a purification method of yellow pigment in turmeric. Background technique [0002] Turmeric, also known as Dioscorea zingiberensis, is a herbaceous vine whose rhizome is yellow or orange and contains starch, tannins, alkaloids, pigments, saponins, etc. It is a classic medicinal material. Turmeric has a long history as medicinal and edible at home and abroad, and its pigment belongs to the list of natural pigments. However, people have paid great attention to the extraction of saponin, a pharmaceutical intermediate from turmeric, for a long time, and the development of turmeric pigment There are not many reports on the use of turmeric pigment. Most saponin production enterprises discharge turmeric pigment with wastewater, which not only pollutes the environment with high chroma of wastewater, but also causes waste of resources. This can provide new natural pigments for food and other indu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C09B67/54
Inventor 陈合舒国伟李世玉王利红
Owner SHAANXI UNIV OF SCI & TECH
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