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Shanghai Shujun Instrument Equipment Co., Ltd
Briefly describe the common problems, causes, and solutions of Sonics ultrasonic disruptors
Date: 2025-11-03Read: 1
In the fields of molecular biology, nanomaterial preparation, and cell engineering, Sonics ultrasonic disruptors utilize the cavitation effect generated by high-intensity ultrasound to accurately crush cells, disperse particles, or break DNA. However, the instrument is prone to passivation or even blade breakage during frequent use, manifested as decreased efficiency, sample overheating, or probe damage. Mastering the causes and coping strategies of common problems with Sonics ultrasonic disruptors is the key to ensuring their normal operation at all times.
Problem 1: The crushing efficiency has significantly decreased, and the processing time has been extended
Reason: The wear or passivation of the end of the ultrasonic probe (amplitude rod) is the main cause. Long term cavitation impact can cause metal probes to form pits or curled edges, reducing energy output efficiency.
Countermeasure: Regularly check whether the probe is smooth and flat. If obvious corrosion is found, professional polishing repair or replacement should be carried out. Avoid running without liquid or load. After each use, use water to ultrasonically clean the surface residue of the probe to prevent dry corrosion.
Problem 2: The rapid increase in sample temperature leads to protein inactivation
Reason: The ultrasound process is accompanied by a large amount of heat release, and if not effectively dissipated, it can easily cause sensitive samples to denature.
Countermeasure: Strictly adopt the "pulse" working mode (such as working for 2 seconds and pausing for 3-5 seconds) to allow heat to dissipate during the intermittent period. Place the sample in an ice water bath to ensure that the bottom of the tube fully contacts the ice surface. For long-term processing, a dedicated sample tank with a refrigeration cycle can be used.
Question 3: Instrument overload alarm or automatic shutdown
Reason: Mostly due to excessive load or impedance mismatch. Excessive sample concentration, probe insertion too deep, or contact with container walls can all cause transducer overload.
Countermeasure: Ensure that the probe tip is located 3-5mm below the liquid level and does not touch the bottom or side wall of the tube. When processing high viscosity samples, dilute or batch them appropriately. Check if the instrument and probe models match to avoid mixing incompatible components.
Question 4: Abnormal probe vibration or sharp noise
Reason: It may be due to loose probe, aging transducer, or unstable power supply voltage.
Countermeasure: Turn off the power and check if the probe is securely connected to the host. If the noise persists, it is necessary to check whether the resonant frequency of the transducer is offset, and if necessary, the manufacturer should calibrate or replace the core module. Ensure that the equipment uses an independent power source and avoid being in line with high-power appliances.
Question 5: Cross contamination of samples
Reason: There is a high risk of residual previous samples on the surface of the probe, especially when dealing with different biological samples.
Countermeasure: Immediately rinse the probe with deionized water after each use, and then wipe it with 70% ethanol for disinfection. For high-risk samples such as viruses and proteins, ultrasonic cleaning or chemical soaking steps can be added. Suggest equipping dedicated probes for different sample types.