Method for extracting natural red pigment from pitaya and application thereof

A technology for natural red pigment and dragon fruit, applied in the field of extraction, can solve the problems of restricted use, difficulty in extraction, easy to be affected by external environment, etc., and achieve the effects of preventing organic residues, expanding the scope of application, and improving color value and stability.

Inactive Publication Date: 2016-10-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the shortcomings and deficiencies of the above-mentioned prior art, the primary purpose of the present invention is to provide

Method used

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  • Method for extracting natural red pigment from pitaya and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: the preparation of dragon fruit natural red pigment

[0036] (1) Take two fresh red-fleshed pitayas, peel them, cut them into pieces, put them into a high-speed centrifugal juicer, beat them into a homogenate to obtain pulp, and then freeze the pulp at -18°C for 12 hours;

[0037] (2) Take out the refrigerated pulp in step (2), thaw it at room temperature until the ice cubes completely melt, mix 1500mL of distilled water with 600g of the thawed pulp, add 3.500g of pectinase, stir evenly, and place at 30°C Carry out enzymatic hydrolysis and extraction together for 30 minutes in a constant temperature water bath;

[0038] (3) Filter the extract after leaching in step (2) with a double-layer 100-mesh filter cloth, and obtain a clear pigment solution through 4000 rpm and 20 min high-speed refrigerated centrifugation with the resulting filtrate;

[0039] (4) get the limpid pigment solution of gained in 50mL step (3), measure its soluble solid content with port...

Embodiment 2

[0040] Embodiment 2: the preparation of dragon fruit natural red pigment

[0041] (1) Take two fresh red-fleshed pitayas, peel them, cut them into pieces, put them into a high-speed centrifugal juicer, beat them into a homogenate to obtain pulp, and then freeze the pulp at -18°C for 12 hours;

[0042] (2) Take out the refrigerated fruit pulp in step (2), thaw it at room temperature until the ice cubes completely melt, mix 1500mL distilled water with 750g thawed fruit pulp, add 5.000g pectinase and stir evenly, place at 30°C Carry out enzymatic hydrolysis and extraction together for 30 minutes in a constant temperature water bath;

[0043] (3) Filter the extract after leaching in step (2) with a double-layer 100-mesh filter cloth, and obtain a clear pigment solution through 4000 rpm and 20 min high-speed refrigerated centrifugation with the resulting filtrate;

[0044] (4) get the limpid pigment solution of gained in 50mL step (3), measure its soluble solids content with porta...

Embodiment 3

[0045] Embodiment 3: the preparation of dragon fruit natural red pigment

[0046] (1) Take two fresh red-fleshed pitayas, peel them, cut them into pieces, put them into a high-speed centrifugal juicer, beat them into a homogenate to obtain pulp, and then freeze the pulp at -18°C for 12 hours;

[0047] (2) Take out the refrigerated pulp in step (2), thaw it at room temperature until the ice cubes completely melt, mix 375mL of distilled water with 150g of the thawed pulp, add 1.100g of pectinase, stir evenly, and place at 30°C Carry out enzymatic hydrolysis and extraction together for 30 minutes in a constant temperature water bath;

[0048] (3) Filter the extract after leaching in step (2) with a double-layer 100-mesh filter cloth, and obtain a clear pigment solution through 4000 rpm and 20 min high-speed refrigerated centrifugation with the resulting filtrate;

[0049] (4) get the limpid pigment solution of gained in 50mL step (3), measure its soluble solids content with portab...

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Abstract

The invention belongs to the technical field of extraction and discloses a method for extracting a natural red pigment from pitaya and application thereof. The method comprises the following steps: (1) selecting fresh red pitaya, peeling off, dicing and crushing flesh to obtain fruit pulp, and then refrigerating the fruit pulp; (2) taking out the refrigerated fruit pulp in the step (1) and unfreezing at the room temperature, then adding distilled water and pectinase and uniformly stirring, and extracting at 20-35 DEG C for 0.5h-2h; (3) filtering an extracting solution extracted in the step (2), and centrifuging the obtained filtrate to obtain a clarified pigment solution; and (4) mixing the clarified pigment solution obtained by the step (3) with wall materials, stirring at the room temperature for completely and uniformly mixing, and drying to obtain a dry pigment product. The method has the advantages of simplicity in operation, high efficiency and energy saving, environmental friendliness and capability of keeping natural active components in the pitaya to the greatest extent; the weight of freeze-dried products is light and the quality is good; the products can be stored for a long time and are convenient to transport; and the obtained pigment solution can be directly applied to food production.

Description

technical field [0001] The invention belongs to the technical field of extraction, in particular to a method for extracting natural red pigment from dragon fruit and its application. Background technique [0002] Natural pigments such as microbial pigments, plant pigments, and mineral pigments extracted from animals, plant tissues, and minerals, among which edible pigments are called natural food pigments. Compared with synthetic pigments, natural pigments have the following advantages: (1) Natural food pigments are mostly derived from the roots, stems, leaves, flowers, fruits and other parts of natural plants, which have higher safety; (2) have nutritional and health functions, many Natural food coloring contains a large amount of nutrients and vitamins necessary for the human body, and many natural food colorings also have certain pharmacological effects; (3) Natural food coloring has a natural color tone, which can increase the color tone and is similar to natural color. ...

Claims

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Application Information

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IPC IPC(8): C09B61/00A23C9/13A23C13/12A23G9/32A21D13/08
CPCA23C9/1307A23C13/12A23G9/32C09B61/00A23V2002/00A23G2200/06A23V2400/123A23V2400/249A23V2200/04A23V2250/21Y02P20/10
Inventor 陈吴翀李丹丹张辉琪吴珍珍王俊鸿卢晓熊犍
Owner SOUTH CHINA UNIV OF TECH
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