The ultrasonic Chinese medicine extraction device is composed of an ultrasonic transducer, a casing, a horn, a tool head (probe) and a driving power source. The ultrasonic transducer is equipped with a fan for cooling to ensure it works efficiently for long periods of time.
Ultrasonic extraction is a technique that uses the mechanical effects, cavitation effects and thermal effects of ultrasonic waves (frequency > 20 KHz) to increase the moving speed of the medium molecules and increase the penetrating power of the medium to extract the active ingredients of the substance (Chinese medicine).
Mechanical effect
The propagation of ultrasonic waves in the medium can cause the medium particles to vibrate in their propagation space, thereby enhancing the diffusion and mass transfer of the medium, that is, the mechanical effect of the ultrasonic waves.
Ultrasonic propagation: 1. Radiation pressure - tissue cell deformation, plant protein denaturation
Molecular friction - biomolecular depolymerization
2. Cavitation effect
The microbubbles dissolved inside the medium are enlarged by the action of ultrasonic waves to form a resonant cavity, and then instantaneously closed, that is, the cavitation effect of the ultrasonic waves.
3. Thermal effect
During the propagation of ultrasonic waves, the sound energy is continuously absorbed by the medium, and all or most of it is converted into heat energy, which causes the temperature of the medium itself and the medicinal material to rise, which promotes the dissolution of the active ingredient, which is the thermal effect of the ultrasonic wave.
Ultrasonic (Chinese medicine) extraction advantages:
1. High extraction efficiency: The unique physical properties of ultrasound promote the breakage or deformation of plant cell tissue, so that the extraction of active ingredients of traditional Chinese medicine is more sufficient, and the extraction rate is significantly improved by 50-500% compared with the traditional process;
2. Short extraction time: Ultrasound-enhanced Chinese medicine extraction usually obtains the best extraction rate in 24-40 minutes, and the extraction time is greatly shortened by more than 2/3 compared with the traditional method, and the raw material processing capacity of the medicinal materials is large;
3. Low extraction temperature: The optimal temperature for ultrasonic extraction of Chinese medicinal materials is 0-60 °C, which has protective effect on the active ingredients in the heat-labile, easily hydrolyzed or oxidized medicinal materials, and greatly saves energy; the extraction temperature is 40- 60 ° C, protect the active ingredients;
4. Wide adaptability: Ultrasonic extraction of Chinese herbal medicines is not limited by the polarity of components and molecular weight, and is suitable for the extraction of most kinds of Chinese herbal medicines and various components;
5. The extraction of chemical liquid is less, and the active ingredient is easy to separate and purify;
6. The extraction process has low operating costs and significant comprehensive economic benefits;
7. The operation is simple and easy, and the equipment maintenance and maintenance are convenient.
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