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Extraction method of leek green pigment, sodium copper chlorophyllin and sodium zinc chlorophyllin prepared by using the method, and stability comparison

A technology of sodium copper chlorophyllin and zinc sodium chlorophyll, which is applied in the field of extraction of green pigment from leeks, can solve the problems of less stability, browning, and fading of natural green pigment, and achieve stable coloring effect, good coloring effect, and extraction and preparation process simple effect

Pending Publication Date: 2021-06-11
HENAN UNIV OF URBAN CONSTR +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a method for extracting leek green pigment and its preparation of copper chlorophyllin sodium salt and chlorophyllin zinc sodium salt and stability comparison, which effectively solves the problems of existing food, medicine and cosmetics. The natural green pigments used in the traditional Chinese medicine are less and less stable, and are easily affected by pH, light, heat, redox agents and other factors to fade or brown the technical problems and deficiencies

Method used

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  • Extraction method of leek green pigment, sodium copper chlorophyllin and sodium zinc chlorophyllin prepared by using the method, and stability comparison
  • Extraction method of leek green pigment, sodium copper chlorophyllin and sodium zinc chlorophyllin prepared by using the method, and stability comparison
  • Extraction method of leek green pigment, sodium copper chlorophyllin and sodium zinc chlorophyllin prepared by using the method, and stability comparison

Examples

Experimental program
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Effect test

Embodiment 1

[0053] A method for extracting leek green pigment, characterized in that it comprises the following steps:

[0054] Step 1. Remove the yellow leaves on the leeks, wash them, cut them into sections, then put them into a vacuum freeze dryer to freeze-dry, then crush them with a pulverizer, pass through a 40-60 mesh sieve, and store them at low temperature in a dark place for later use;

[0055] Step 2, weigh 10g of leek powder or directly take the washed fresh leek and homogenize it with a homogenizer in a ratio of 1:1;

[0056] Step 3: Add the aqueous solution containing 0.3% cellulase and 0.1% pectinase compound enzyme at the ratio of solid to liquid ratio of 1:4, use salicylic acid to adjust the pH value of the environment to 4.8, and bathe in water at 45°C for 60 minutes , treated under the condition of microwave power of 600W for 60S, filtered to remove the supernatant, and collected the filter residue A for later use;

[0057] Step 4, adding the edible ethanol whose volum...

Embodiment 2

[0066] A method for preparing sodium copper chlorophyllin, comprising the following steps:

[0067] S1: Saponification; pour the fat-soluble green pigment mainly composed of chlorophyll into a beaker, use 10% NaOH to adjust the pH to 12-13, and saponify 30- 40min;

[0068] S2: Complete saponification; take it out after saponification, then cool to room temperature, filter to remove unsaponifiable viscous impurities, then transfer the saponified liquid into a separatory funnel and add petroleum ether equal to the volume of the saponified liquid, then fully shake and stand still After stratification, the upper layer is yellow and is completely saponified;

[0069] S3: Acidify copper; put the extract from the lower layer of the separating funnel in S2 into a beaker, adjust the pH value to 1.5-2.0 with 10% HCl, add acid to make it fully react, the solution turns yellowish brown and generates magnesia green acid;

[0070] Detect the content of magnesium ions;

[0071] Add 10% c...

Embodiment 3

[0080] A method for preparing chlorophyll zinc sodium salt, is characterized in that, comprises the following steps:

[0081] a: the concentration of 10ml leaching is 1g / ml and the fat-soluble green pigment based on chlorophyll is placed in a round bottom flask;

[0082] b: Saponification; add 10% NaOH to adjust the pH to 12-13, the saponification temperature is 60°C, the saponification time is 30min, and the ultrasonic power is 200W;

[0083] c: extraction; according to the condition of 1:1, add petroleum ether to the cooled saponified liquid, let it stand for several hours to separate, the lower layer is dark green saponified liquid;

[0084] d: acidification; use 10% HCl to adjust the pH to 2-3 after collecting the dark green lower layer;

[0085] e: Substitute zinc; add the acidizing solution to the zinc sulfate solution at a ratio of liquid to material of 1:1, the ultrasonic temperature is 70°C, the ultrasonic time is 1h, the ultrasonic power is 200W, and the chlorophyll...

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Abstract

The invention relates to an extraction method of leek green pigment, sodium copper chlorophyllin and sodium zinc chlorophyllin prepared by using the method, and stability comparison, and solves the technical problems of less natural green pigment and poor stability in food, medicines and cosmetics. According to the technical scheme, the method comprises leek selection, cleaning, fat-soluble green pigment preparation, saponification, acidification for copper placement, static salification and application effect. The preparation method comprises the following steps: cleaning leek leaves, freeze-drying, crushing, and carrying out complex enzyme-assisted microwave treatment; carrying out ultrasonic-assisted extraction on fat-soluble green pigment by using edible ethanol, and heating in a water bath to remove odor; and performing reduced pressure distillation and concentration, and perserving the product away from light. In order to conveniently preserve the leek green pigment and improve the stability, the prepared fat-soluble green pigment is saponified under a strong alkali ultrasonic condition, magnesium ions are replaced into copper or zinc ions under a strong acid condition, and the fat-soluble green pigment is still salified under an alkaline condition and dried into a salified sample. The product is easily dissolved in water, is convenient to store, has better stability than fat-soluble green pigment, can be used as green pigment in foods, medicines and the like, and has nutrition and health care functions.

Description

technical field [0001] The invention relates to the technical fields of extraction and preparation of natural food pigments and food additives, in particular to a leek green pigment extraction method, preparation of sodium copper chlorophyllin and sodium zinc chlorophyllin, and stability comparison. Background technique [0002] Nowadays, the application of pigments in the market is increasing day by day, but synthetic pigments account for a relatively large share of the pigments currently used in the market, and natural pigments are not commonly used. A large number of research reports have pointed out that almost all synthetic pigments cannot provide nutrients to the human body, some synthetic pigments may even endanger human health, some have chemical effects on skin, clothing, fibers, etc., and long-term exposure may cause various adverse reactions; If it is used excessively or improperly in food, it will cause cancer in the body and endanger human health. This makes pe...

Claims

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Application Information

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IPC IPC(8): C09B61/00C09B67/54C07D487/22A23L5/43
CPCC09B61/00C09B67/0096C07D487/22A23L5/43
Inventor 洪军王永强高建民叶延欣黄玮玮张开放李倩刘志宏蒋梦瑶马栋豪李美换刘丙欣马伟皓
Owner HENAN UNIV OF URBAN CONSTR
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