Problems encountered in the daily use of ultrasonic processors
1. When to change the tip?
Ultrasonic liquid processor/ultrasonic cell crusher replaceable "tip" heads are often used in high-energy applications where wear may occur. When energy is transferred through the tip head, corrosion occurs where traces are left on the metal surface. Over time, the area where the corrosion occurred will develop a slight plaque. The tip can be polished with sandpaper or gauze unless damaged to a certain extent; When this happens, the tip head will have a hard time tuning the frequency and may instead produce a long, sharp noise that eventually cracks. Since the price of "tip" head is relatively cheap, we suggest that it should be replaced after the second polishing.
2. Working hours
Ultrasonic continuous working time should not exceed 5 seconds each time, and the working interval time should be greater than or equal to the ultrasonic time, so as to facilitate heat emission. The time setting should be based on the principle of short ultrasonic time and multiple ultrasonic times, which can prolong the life of Ultrasonic liquid processor/ultrasonic cell crusher and ultrasonic probe.
3. Ultrasonic power
It should not be too large to avoid sample spatter or foam. If the sample capacity is less than 10ml, the power should be less than 200w. Use 2mm ultrasonic probe. The power of 10-200ml sample capacity is 200-400w. 6mm ultrasonic probe is selected and the amplitude transformer behind the panel is hit to the corresponding gear. The sample capacity power above 200ml is between 300-600w, 10mm ultrasonic probe is selected, and the amplitude transformer behind the panel is hit to the corresponding block; (the power of small probe with 2mm is forbidden to exceed 350W). For example, alkaloids were extracted from the total alkaloids in acacia pseudoacacia by ultrasonic cell pulverizer. The extraction rate was more than 85% after two ultrasonic extraction at room temperature. Compared with normal temperature extraction 4- 6 hours/time, three times extraction effect is better.
