1、 Industry standard system review

The industry standards for ultrasonic cell disruptors (also known as ultrasonic cell disruptors) cover multiple levels such as group standards and enterprise standards. The core standards specify the requirements for the entire process of equipment design, production, and inspection, providing a basis for product quality control and market access. The current mainstream applicable standards are as follows:

（1） Core standards

Group Standard T/ZZB 3824-2024: The current core standard specifies the basic requirements, technical requirements, test methods, inspection rules, instructions and labeling, packaging, transportation, storage, and quality commitments for ultrasonic cell pulverizers. It is applicable to equipment that uses the principle of ultrasonic cavitation for cell pulverization.

Enterprise Standard Q/NXZ004-1999: A product standard adopted by some enterprises, which specifies the technical parameters, inspection methods, and other requirements for equipment. Products must comply with this standard and obtain an import and export commodity inspection certificate before they can be exported abroad.

Reference national standards: GB/T 5226.1-2019 (Mechanical and Electrical Safety Part 1: General Technical Conditions), GB/T 10610 (Product Geometric Technical Specification - Rules and Methods for Evaluating Surface Structure by Surface Structure Profile Method), GB/T 3177 (Inspection of Smooth Workpiece Dimensions), etc., to provide a basis for equipment electrical safety, size measurement, etc.

（2） Standard Core Technical Requirements

1. Design and material requirements

Drive and structural design: Using phase-locked loop technology to design power ultrasonic drive circuit and DC voltage regulation module, achieving linear adjustment of transducer output power; The dimensions of ultrasonic transducers and amplitude rods need to be determined through finite element analysis.

Material properties: The screw is made of alloy steel with tensile strength ≥ 1200MPa and yield strength ≥ 1080MPa; Priority should be given to using titanium alloy with a tensile strength of ≥ 895MPa for the amplitude lever; The electrode plate is made of copper alloy with a resistivity of ≤ 0.135 Ω· mm ²/m.

2. Appearance and structural performance

Appearance quality: The generator has no burrs or rust on the surface, the soundproof box paint is smooth and even, the buttons and knobs are flexible to adjust, and the nameplate markings are clear.

Structural parameters: The surface roughness of the connecting end between the amplitude rod and the transducer is ≤ Ra0.3 μ m, and the surface roughness of the connecting rod is ≤ Ra0.8 μ m; The travel distance of the soundproof box lifting platform is ≥ 100mm; the misalignment deviation between the piezoelectric ceramic and the electrode plate is ≤ 0.5mm.

Operating performance: The resonant frequency of the transducer component is 20.00kHz to 25.00kHz, and the impedance of the transducer (without amplitude rod) is less than 30 Ω; Support software control parameters, which can automatically adapt power according to the amplitude pole; The automatic soundproof box has electric lifting and lighting functions.

3. Safety and environmental requirements

Electrical safety: Insulation resistance ≥ 20M Ω; withstand 1500V test voltage for 1 minute without breakdown or flashover phenomenon.

Noise control: The sound pressure level noise during load operation is ≤ 73dB (A).

4. Core functional requirements

The pulverization rate of Escherichia coli is ≥ 95%; Equipped with parameter adjustment functions such as power, time, and intermittent ratio, it can balance the contradiction between crushing efficiency and sample temperature rise, avoiding target product denaturation.

2、 Testing plan

This plan is based on current industry standards and covers the core items of equipment factory inspection and type inspection. At the same time, it supplements effect verification in application scenarios to ensure that equipment performance meets standards and actual usage needs.

（1） Detection classification and applicable scenarios

Factory inspection: Inspect each unit, covering necessary inspection items such as appearance, operational performance, insulation resistance, noise, and crushing rate, to ensure that the product is qualified for factory delivery.

Type inspection: applicable to scenarios such as new product finalization, significant changes in design/process/materials, and resumption of production after more than one year of shutdown, requiring additional inspection of electrical strength and other items.

Application effect verification: Verify the crushing efficiency and target product extraction effect of the equipment under parameters for different sample crushing requirements (plant cells, microorganisms, etc.).

（2） Core testing items and methods

（3） Application effect verification scheme (taking plant cells as an example)

1. Experimental purpose

Optimize ultrasound parameters, verify the efficiency of equipment in crushing plant cells, and evaluate the extraction effect of target products (such as total protein).

2. Experimental materials and equipment

Arabidopsis suspension cells, ultrasonic cell disruptor (such as JY92-IIN type, power 0-600W, frequency 20kHz), microscope, hemocytometer, enzyme-linked immunosorbent assay (ELISA) reader, BCA protein detection kit, centrifuge, etc.

3. Testing steps

Parameter setting and grouping: Single factor variable method was used to set ultrasound power (200W, 300W, 400W), total time (30s, 60s, 90s), interval ratio (1:1, 1:2, 1:3), with 3 parallel samples in each group. The non ultrasound group was used as the control.

Ultrasonic treatment: Insert the probe into the sample liquid surface 1-2cm, and immerse it in an ice bath throughout the process (control temperature 0-4 ℃). Start the equipment according to the grouping parameters, and cool it in the ice bath for 5 minutes after completion.

Fragmentation rate detection: Using the same method as E. coli detection, count and stain the cells, and calculate the fragmentation rate.

Target product extraction efficiency detection: 1 Centrifuge the sample at 12000rpm and 4 ℃ for 15 minutes, and collect the supernatant; 2. Determine the total protein concentration using BCA method, draw a standard curve, and calculate the protein concentration of the sample; 3. Evaluate the correlation between extraction efficiency and ultrasound parameters.

Repeatability verification: Repeat the experiment three times using parameters and calculate the relative standard deviation (RSD). RSD ≤ 5% indicates stability.

（4） Key points of quality control in testing

Equipment calibration: Before testing, it is necessary to calibrate power meters, frequency meters, sound level meters and other testing instruments with standard substances to ensure that the accuracy meets the standard.

Parallel sample control: At least 3 parallel samples are set for each testing item, and the average and standard deviation are calculated to ensure data reliability.

Environmental control: Noise detection should avoid external interference, and the temperature should be strictly controlled during ultrasonic processing of samples to prevent target product denaturation.

Data recording: Detailed recording of testing parameters, environmental conditions, measurement results, establishment of complete testing archives for easy traceability.

3、 Conclusion

The industry standard for ultrasonic cell disruptors is centered around T/ZZB 3824-2024, which specifies comprehensive requirements for equipment design, materials, performance, safety, and other aspects; The corresponding testing plan should cover factory inspection, type inspection, and application effect verification, combined with national standard methods and practical application scenarios, to ensure that the equipment quality is qualified and the performance is stable. In actual testing, it is necessary to strictly follow standard requirements, standardize operating procedures, ensure the accuracy and authority of testing data, and provide reliable support for equipment quality control and application effect evaluation.