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High-activity black sesame melanin and extraction method thereof

An extraction method, black sesame technology, applied to chemical instruments and methods, azo dyes, organic dyes, etc., can solve the problems of low extraction rate, difference of black sesame melanin components, long time of solvent extraction, etc., and achieve improvement Effect of extraction rate, protection of physiological activity, and improvement of utilization value

Pending Publication Date: 2020-03-31
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the extraction of black sesame melanin mainly adopts solvent extraction or ultrasonic extraction. The solvent extraction method takes a long time, requires a large amount of solvent, and has the disadvantages of low extraction rate. Moreover, the product is black sesame mixed pigment, and its physiological activity is not high.
Most of the solvent extraction methods are to study how to improve the overall extraction rate and color value of the pigment. If the solvent extraction conditions used are different, the extraction effect of black sesame melanin will be different, resulting in great differences in the extracted black sesame melanin components.

Method used

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  • High-activity black sesame melanin and extraction method thereof
  • High-activity black sesame melanin and extraction method thereof
  • High-activity black sesame melanin and extraction method thereof

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Experimental program
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preparation example Construction

[0045] The preparation method of the defatted black sesame powder involved in the embodiment:

[0046] The black sesame is pulverized by a pulverizer and collected, and the collected black sesame powder is degreased with petroleum ether, and then placed in a ventilated place to dry to obtain the defatted black sesame powder.

Embodiment 1

[0048] Defatted black sesame powder and 60vol% ethanol were mixed evenly at a material-liquid ratio of 3g: 1L, then pulsed three times at an electric field strength of 500V / cm and a pulse temperature of 60°C, and then at an ultrasonic power of 390W and an ultrasonic temperature of Ultrasonic treatment was performed at 60°C for 30 minutes, the treated solution was centrifuged at 4000 r / min for 20 minutes, and the supernatant obtained by centrifugation and vacuum filtration was evaporated to ethanol-free with a rotary evaporator to obtain a concentrated solution. After the concentrated solution is adsorbed by the activated AB-8 macroporous adsorption resin, it is eluted with ethanol with a volume fraction of 70vol%, and the eluted liquid is concentrated again by a rotary evaporator until there is basically no ethanol residue. The temperature is from -80°C to -60°C, and the degree of vacuum is 0.01 to 0.08MPa and freeze-dried to obtain a black sesame melanin sample. The content o...

Embodiment 2

[0050] Defatted black sesame powder and 60vol% ethanol were mixed uniformly at a material-liquid ratio of 1g:1L, and then pulsed once at an electric field strength of 100V / cm and a pulse temperature of 60°C, and then the ultrasonic power was 390W, and the ultrasonic temperature was Ultrasonic treatment was performed at 60°C for 30 minutes, the treated solution was centrifuged at 4000 r / min for 20 minutes, and the supernatant obtained by centrifugation and vacuum filtration was evaporated to ethanol-free with a rotary evaporator to obtain a concentrated solution. After the concentrated solution is adsorbed by the activated AB-8 macroporous adsorption resin, it is eluted with ethanol with a volume fraction of 70vol%, and the eluted liquid is concentrated again by a rotary evaporator until there is basically no ethanol residue. The temperature is from -80°C to -60°C, and the degree of vacuum is 0.01 to 0.08MPa and freeze-dried to obtain a black sesame melanin sample. The content ...

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Abstract

The invention, which belongs to the field of food, particularly relates to high-activity black sesame melanin and an extraction method thereof. The extraction method comprises the following steps: (1), uniformly mixing degreased black sesame powder with an ethanol solution; (2), sequentially carrying out pulsed electric field treatment, ultrasonic extraction and centrifugal treatment on the mixture obtained in the step (1), carrying out reduced-pressure suction filtration, and evaporating the obtained supernatant until no ethanol exists to obtain a concentrated solution A; (3), adsorbing the concentrated solution A with resin, carrying out eluting with an ethanol solution, and carrying out evaporating and concentrating again to obtain a concentrated solution B; and (4), carrying out freezedrying on the concentrated solution B to obtain the high-activity black sesame melanin. According to the invention, the functional component melanin in the black sesame is extracted by adopting a novel process of pulsed electric field with ultrasound treatment, so that the physiological activity of the black sesame is better protected while the extraction rate of the melanin in the black sesame is improved and thus the utilization value of the black sesame is increased.

Description

technical field [0001] The invention belongs to the field of food, and more specifically relates to a highly active black sesame melanin and an extraction method thereof. Background technique [0002] Black sesame is not only a kind of natural melanin, but also has nutritional value and pharmacological effects, especially has a strong oxidation effect. Modern consumers are increasingly pursuing pure natural, nutritious and healthy pigments in terms of food pigments. Black sesame melanin can inhibit the absorption of cholesterol in the human intestine and reduce the content of cholesterol in the blood, and it also has a very strong antioxidant effect. In summary, black sesame melanin has many functions such as scavenging free radicals, anti-oxidation, anti-tumor and lowering blood fat. It is a new type of natural food coloring that integrates nutrition and health care and has unlimited potential for utilization. [0003] The processing and utilization of black sesame in our...

Claims

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Application Information

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IPC IPC(8): A23L33/105A23L5/43C09B61/00C09B67/54
CPCA23L33/105A23L5/43C09B61/00C09B67/0096A23V2002/00
Inventor 何毅
Owner WUHAN POLYTECHNIC UNIVERSITY