The principle and characteristics of ultrasonic extraction of Chinese medicine

Ultrasonic extraction is a technology that uses the mechanical, cavitation, and thermal effects of ultrasonic waves (frequency> 20KHz) to increase the speed of media molecules and increase the penetrating power of the media to extract the effective components of substances (Chinese medicine). The propagation of ultrasonic waves in the medium can cause the medium particles to vibrate in the propagation space, thereby enhancing the diffusion and mass transfer of the medium, that is, the mechanical effect of ultrasonic waves.

Advantages of ultrasonic extraction:
1. High extraction efficiency: the unique physical properties of ultrasound promote the breakage or deformation of plant cell tissues, so that the effective components of traditional Chinese medicine can be extracted more fully and the extraction rate
Significantly increase by 50-500% compared with traditional crafts;
2. Short extraction time: Ultrasonic enhanced traditional Chinese medicine extraction usually takes 24-40 minutes to obtain the best extraction rate, and the extraction time is much shorter than traditional methods.
More than 2/3, the processing volume of medicinal materials is large;
3. Low extraction temperature: the best temperature for ultrasonic extraction of Chinese medicinal materials is 0-60℃, which has a protective effect on the active ingredients in medicinal materials that are unstable, easily hydrolyzed or oxidized when exposed to heat, and greatly saves energy and energy consumption; the extraction temperature is 40— 60℃, protect the effective ingredients;
4. Wide adaptability: Ultrasonic extraction of Chinese medicinal materials is not restricted by the polarity and molecular weight of the ingredients, and is suitable for the extraction of most types of Chinese medicinal materials and various components;
5. The extracted liquid has less impurities, and the effective ingredients are easy to separate and purify;
6. The extraction process has low operating cost and significant comprehensive economic benefits;
7. The operation is simple and easy, and the equipment maintenance and maintenance are convenient.