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Verification regulations for planktonic bacteria samplers


The planktonic bacteria sampler is an important tool for monitoring microbial pollution in the air. In order to ensure that the equipment provides accurate and reliable data, it is crucial to follow strict calibration procedures.
1、 Preparation before verification
1. Equipment cleaning and disinfection: Before calibration, it is necessary to ensure that the sampler and its accessories have been cleaned and disinfected. This is to avoid the residue from the previous use affecting the sampling results.
2. Performance check: Check all moving parts of the sampler to ensure they are working properly. This includes the operation of the motor, the accuracy of the flow meter, and the integrity of the physical structure.
3. Calibration equipment: Use a standard particle generator and particle counter to calibrate the flow meter of the sampler, ensuring that the displayed flow rate is consistent with the actual flow rate.

2、 Verification process
1. Set up calibration environment: Choose a well controlled environment for calibration to avoid interference from external factors such as temperature, humidity, and air flow.
2. Sampling efficiency test: Sample using standard microbial aerosols of known concentration, and then determine the number of captured microorganisms through cultivation or molecular biology methods to evaluate sampling efficiency.
3. Blank sample detection: Collecting blank samples to detect potential contamination in equipment, media, or operational processes.
4. Repeatability and reproducibility testing: Sampling microbial suspensions of the same concentration multiple times, evaluating the consistency of the results to confirm the reliability of the sampler.


3、 Operation after verification
1. Data analysis: Conduct a detailed analysis of the collected samples and compare them with the expected results to determine whether the performance of the sampler meets the standards.
2. Maintenance and adjustment: Based on the calibration results, make necessary adjustments and maintenance to ensure that the sampler can continue to provide accurate data in future use.

3. Recording and reporting: Detailed recording of the verification process and results, providing a basis for future certification or auditing.
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