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Deodorized radish red pigment and deodorization method

A technology of radish red and red pigments, which is applied in the field of deodorization of natural pigments of cruciferous plants, to achieve the effect of improving purity and color value, high purity and high color value

Inactive Publication Date: 2009-09-09
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water extract of radish red pigment often contains a large amount of impurities such as sugar, protein, cellulose, etc.

Method used

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  • Deodorized radish red pigment and deodorization method
  • Deodorized radish red pigment and deodorization method
  • Deodorized radish red pigment and deodorization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Choose 5 kg of red-skinned red-hearted radish with deep red color and tight and uniform texture, wash, arrange, cut into pieces, quickly put it into boiling water and fill it with steam to quickly heat to boiling for 5-10 minutes. The radish pieces after the boiling water treatment are squeezed together with the boiling water to obtain 5 L of filtrate and 1.5 kg of filter residue, and the radish residue is subjected to enzymatic hydrolysis treatment, and an acidic aqueous solution is added to the radish residue according to a solid-liquid ratio of 1:1 (m:v). Adjust the pH to 3.5, add pectinase (20000U / g) at the same time, the dosage is 0.2g / kg radish residue weight, temperature 45°C, stir at low speed for 2 to 4 hours, centrifuge to collect the extract, enzymolysis is also soaking The process of extracting the red pigment. Pectinase can hydrolyze plant tissue to facilitate the extraction of pigments, and at the same time remove most of the pectin and improve clarity. C...

Embodiment 2

[0036] Select 5 kg of local green-skinned and red-heart radishes in Jiangsu Province that are round and even, and obtain 5 L of radish stock juice through the pretreatment steps of Example 1 above. Then adjust the pH of the red radish juice to 3.5, then carry out the enzymatic hydrolysis treatment as in Example 1. Carry out deodorization and clarification treatment to the radish red stock solution, adjust the pH value of the filtrate to 4, add 2% (w / w) chitosan (the degree of deacetylation is 90%), stir at a slow speed for 2 minutes, let stand for 3 hours, and filter Obtain dark red clear, tasteless, transparent radish extract.

Embodiment 3

[0038] Obtain the pigment stoste of red-skinned red-heart radish according to the processing method of embodiment 1, then carry out deodorizing clarification process, adjust pH value to 3.5, add the chitosan (90% deodorized radish raw material) of 0.5% and 5% (w / w radish raw material) respectively degree of acetylation), stirred at a slow speed for 2 minutes and then allowed to stand for 3 hours. See Table 1 for specific clarification and deodorization conditions.

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Abstract

The invention relates to a deodorized radish red pigment and a deodorization method. The deodorization method comprises the steps as follows: a radish is preheated, crushed and squeezed; pectinase is then respectively added into residues and juices to carry out enzymolysis; filter liquor is combined to obtain radish raw juices; under acid environment, chitosan with certain deacetylation degree isadded into the raw juices, odor of precursor substance glucosinolate is removed, and the purpose of deodorization is finally achieved; red pigment concentrated solution is obtained through separationand concentration, and the radish red pigment powder is obtained through carrying out spray dying for the red pigment concentrated solution. Compared with the traditional deodorization method with ion exchange, macroporous resin adsorption, acid treatment, membrane separation, and the like, the invention has simple technology and high deodorization efficiency, is green and safe, and is suitable for medium and large scale production. The prepared radish red pigment is tasteless, has natural and deep colors as well as favorable water solubility, and can be widely applied to the food and medicine field such as beverages, ciders, candies, and the like.

Description

technical field [0001] The invention relates to a method for deodorizing natural pigments of cruciferous plants, in particular to the purification and deodorization of radish (Raphanus sativus L.) anthocyanin extracts and pigment preparations containing the pigments by utilizing the natural adsorption properties of chitosan The method also includes a purification and deodorization treatment method for the cruciferous plant extract. Background technique [0002] Radishes are rich in anthocyanins, an excellent source of natural red pigments. China has a history of radish cultivation for thousands of years, and the raw materials are grown in a wide area with low prices. In addition, compared with anthocyanins from other sources, radish anthocyanins have high stability and strong coloring power, and can be widely used in beverages, wine, fruit wine, candy, meat products, and medicine. Radish anthocyanin extract, also known as radish red pigment, belongs to the cruciferous plan...

Claims

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Application Information

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IPC IPC(8): C09B61/00C09B67/54
Inventor 敬璞董英陈力宏
Owner JIANGSU UNIV
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