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Method for extracting coreopsis tinctoria pigment through ultrasonic method

An ultrasonic method, ultrasonic technology, applied in the field of separation and extraction of biological products, can solve the problems of low extraction rate, long time-consuming pigment, high energy consumption, etc., and achieve the effect of low cost, simple process flow, and no toxic and side effects

Inactive Publication Date: 2015-03-11
NANJING AGRICULTURAL UNIVERSITY
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Problems solved by technology

The traditional extraction method takes a long time to extract pigments, consumes a lot of energy, and the extraction rate is low. Ultrasonic-assisted extraction can alleviate such problems

Method used

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  • Method for extracting coreopsis tinctoria pigment through ultrasonic method
  • Method for extracting coreopsis tinctoria pigment through ultrasonic method

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Embodiment Construction

[0019] best practice

[0020] The Kunlun snow chrysanthemum picked at the full bloom stage is manually sorted to remove debris, dried at 60±2°C, crushed and passed through a 60-mesh sieve. Weigh 0.25g Kunlun snow chrysanthemum powder into a 50mL Erlenmeyer flask for ultrasonic extraction.

[0021] Move the Kunlun snow chrysanthemum powder into the extraction equipment, add the extraction solvent ethanol according to the ratio of solid to liquid 1:32.05, and the concentration of ethanol is 72.25%. During the ultrasonic extraction process, the extraction temperature was kept at 70°C, and after the temperature was selected, the extract was extracted at a constant temperature for 60 minutes, and the extract was taken out and filtered by suction to obtain the Kunlun chrysanthemum pigment extract.

[0022] The pigment colloid was obtained after rotary evaporation of Kunlun snow chrysanthemum pigment extract. The pigment powder was obtained by degreasing with ether and then drying....

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Abstract

The invention discloses a method for extracting coreopsis tinctoria pigment through an ultrasonic method. The method comprises the following specific steps: (1) manually selecting to remove sundries from coreopsis tinctoria picked during a full-bloom stage, drying the coreopsis tinctoria, crushing the dried coreopsis tinctoria through a crushing machine, screening the crushed coreopsis tinctoria, and weighing an appropriate amount of coreopsis tinctoria powder for standby application according to the volume of an extracting instrument; (2) performing ultrasonic assisted extraction on the products obtained in the step (1); (3) performing vacuum filtration on the products obtained in the step (2), mixing coarse filtrates and performing suction filtration so as to obtain extraction liquid, performing rotary evaporation on extraction liquid, concentrating so as to obtain pigment colloid, removing grease through diethyl ether, and drying the pigment colloid so as to obtain pigment powder. The method has the advantages that the technological processes are simple, the cost is low, and the original nutrient substances and the functional components in the coreopsis tinctoria are not damaged. The natural pigment extracted through the method is mild in performance and has no toxic or side effects.

Description

technical field [0001] The invention relates to a method for extracting natural pigments, belonging to the technical field of separation and extraction of biological products. Background technique [0002] Kunlun Snow Chrysanthemum is the inflorescence head of Coreopsis tinctoria Nutt. in the Asteraceae family. It can be used as medicine after drying, and can also be used as tea. The tea soup is crimson red. The tongue-shaped petals of Kunlun snow chrysanthemum are bright in color and thick in texture, and the deep color of the tubular petals is suitable for extracting natural pigments. Compared with synthetic pigments, natural pigments have the advantages of stable quality, good dyeing properties, no toxic side effects and even pharmacological health effects. Therefore, natural pigments have won more and more favor. The traditional extraction method takes a long time to extract pigments, consumes a lot of energy, and has a low extraction rate. Ultrasonic-assisted extractio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00
CPCC09B61/00
Inventor 郭巧生徐璐汪涛
Owner NANJING AGRICULTURAL UNIVERSITY
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