Ultrasonic extraction technology has become a highly efficient method for laboratory and industrial applications, particularly effective in extracting natural plant components. Correctly selecting the operational frequency of ultrasonic extraction equipment is crucial for ensuring both extraction efficiency and quality. So, how should we choose the frequency of ultrasonic extraction equipment?
Common Frequencies Used in Ultrasonic Extraction Equipment
The frequencies for ultrasonic extraction equipment generally range from 20kHz to 100kHz. This range can generate effective mechanical actions and cavitation effects, enhancing substance transfer and component solubilization during the extraction process.
- 28kHz and 40kHz: These frequencies are most commonly used in ultrasonic extraction, suitable for extracting a wide variety of natural products. Ultrasonic waves at these frequencies can penetrate deeply into materials, effectively breaking down plant cell walls and releasing more active ingredients.
- High Frequency Ultrasound (above 68kHz): Higher frequencies are suitable for more delicate extractions where the structural integrity of sensitive components needs to be preserved. High-frequency ultrasound provides a gentler cavitation effect, reducing physical damage to the extracts.
Impact of Ultrasonic Frequency on Extraction Outcomes
Scientific Basis for Frequency Selection
The choice of ultrasonic frequency should be based on the characteristics of the material being extracted and the extraction goals. Low-frequency ultrasound is suitable for extracting difficult-to-dissolve components due to its strong cavitation effects, while high frequencies are better for extracting sensitive substances. Scientifically selecting the frequency can not only improve extraction efficiency but also ensure the activity and integrity of the extracts.
Technical Parameters and Practical Applications
In practical applications, other technical parameters of ultrasonic equipment, such as power, capacity, and design, should be considered. These factors, together with frequency, determine the overall performance of the equipment. Appropriate equipment configuration and operating parameters can maximize extraction efficiency, reduce extraction time, and decrease energy consumption.
