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Method for extracting lentinan by virtue of ultrasonic coupling subcritical water

A technology of lentinan and subcritical water, which is applied in the field of plant fungal polysaccharide extraction, can solve the problems of not being able to reflect the advantages of subcritical water and low mass transfer efficiency, and achieve the goal of improving ultrasonic enhancement, high extraction yield, and strong solubility Effect

Inactive Publication Date: 2015-01-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of raw materials and solvent (water) in the extraction process of this study is fixed, the water is in a static state, and the mass transfer efficiency is relatively low, so the extraction rate cannot reflect the advantages of subcritical water extraction.

Method used

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  • Method for extracting lentinan by virtue of ultrasonic coupling subcritical water
  • Method for extracting lentinan by virtue of ultrasonic coupling subcritical water
  • Method for extracting lentinan by virtue of ultrasonic coupling subcritical water

Examples

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Effect test

Embodiment 1

[0024] Ultrasonic coupling subcritical water extraction method: dried shiitake mushrooms to constant weight are crushed and passed through a 40-mesh sieve, and the material is measured according to the liquid-to-solid ratio of 30mL / g. The pressure is 5MPa, the temperature is 190°C, the ultrasonic frequency is 20kHz, and the power density is 3.15W / cm 2 , the extraction time was 40min, and the extraction yield of mushroom polysaccharide was 34.0%.

Embodiment 2~6

[0026] Ultrasonic coupling subcritical water extraction method: dried shiitake mushrooms to constant weight are crushed and passed through a 40-mesh sieve, and the material is measured according to the liquid-to-solid ratio of 30mL / g. The pressure is 5MPa, the temperature is 150, 160, 170, 180, 190°C, the ultrasonic frequency is 40kHz, and the power density is 3.95W / cm 2 , the extraction time was 40min, and a separate subcritical water extraction was used as a comparison, and the extraction yield of mushroom polysaccharide was as follows figure 1 shown.

Embodiment 7~11

[0028] Ultrasonic coupling subcritical water extraction method: dried shiitake mushrooms to constant weight are crushed and passed through a 40-mesh sieve, and the material is measured according to the liquid-to-material ratio of 30mL / g, and then the material is put into the extraction kettle, vacuumed and degassed to a vacuum degree of 0.08MPa, and the extraction temperature The temperature is 180°C, the pressure of the extraction kettle is controlled at 3, 4, 5, 6, and 7MPa, the ultrasonic frequency is 20kHz, and the power density is 3.15W / cm 2 , the extraction time was 40min, and a separate subcritical water extraction was used as a comparison, and the extraction yield of mushroom polysaccharide was as follows figure 2 shown.

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Abstract

The invention discloses a method for extracting lentinan by virtue of ultrasonic coupling subcritical water. The method comprises the following steps: cleaning, drying, crushing and screening lentinus edodes; putting the lentinus edodes into an extraction kettle; vacuumizing to remove air until the vacuum degree is over 0.05 MPa; pumping preheated deionized water into the extraction kettle at a rate of 10-50L / h; controlling the temperature of the extraction kettle to be 150-190 DEG C and the pressure to be 3-7 MPa; directly treating the materials in the extraction kettle by adopting built-in ultrasound, wherein the extraction time is 20-60 minutes; cooling an extracting solution by virtue of a cooler, and collecting the extracting solution; and performing suction filtration, concentration, ethanol deposition, centrifuging, supernatant removal, washing deposition and drying deposition to obtain the lentinan. The extraction method by virtue of the ultrasonic coupling subcritical water, disclosed by the invention, is good in uniformity, the extraction yield of the lentinan is high, the extraction time is short, and the total oxidation resistance of the lentinan is relatively strong, so that the invention starts an efficient, low-consumption and environment-friendly new method for extracting active polysaccharide.

Description

technical field [0001] The application of the present invention relates to the field of extraction of polysaccharides from plant fungi, in particular to a process for extracting polysaccharides from edible mushrooms with ultrasonically coupled subcritical water. Background technique [0002] Lentinus edodes is a dual-purpose fungus for medicine and food, which contains a variety of medicinal ingredients. Among them, lentinan plays the role of non-specific immune signal molecules in animal and human cell systems to regulate the immune function of the recipient cells themselves. It has anti-virus, anti-tumor, immune Regulatory and antioxidant functions. Because of its low toxic and side effects and good curative effect, it has important development and research value. Using mushroom polysaccharide as a functional factor to develop health food has broad development prospects. [0003] At present, most of the industries use traditional water extraction and alcohol precipitation...

Claims

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Application Information

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IPC IPC(8): C08B37/00
Inventor 杨日福闵志玲范晓丹张凡
Owner SOUTH CHINA UNIV OF TECH
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