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Collection Regarding Iso17025 Laboratory Accreditation Quality Assurance
According to the requirements of element 5.9, the quality assurance of the test results should be considered. If only considering the quality control within the laboratory is incomplete, how can the annual quality control plan be considered to meet the quality assurance requirements in terms of frequency, quantity, etc? How does the sampling process and on-site monitoring process reflect the concept of quality control or quality assurance? Currently, there is no comparable version, and how will it be judged during the review? (Environmental laboratory)
Answer: The quality control mentioned in element 5.9 of CNAS-CL01 is divided into internal quality control and external quality control. The emphasis on internal quality control is to implement quality control plans for each testing technology and method, such as the frequency of quality control samples and personnel comparison frequency. The purpose of quality control is to ensure the accuracy and precision level of testing results. The methods and frequency of quality control are closely related to the stability, technical complexity, and personnel experience of the testing methods. Therefore, the best way to implement element 5.9 is to clarify quality control requirements in the corresponding testing or calibration methods, such as conducting blank samples, parallel samples, spiked recovery, standard sample quality control, etc. according to method requirements or industry requirements, or conducting personnel/instrument/method comparisons and retention retesting based on a certain frequency.
The quality control plan can be annual or multi-year, such as three or five years in total
Plan, especially for capability verification or external comparison plans. The purpose of quality control is to control the quality of final testing data or reports, so its formulation involves controlling all aspects of quality; The second is to meet the needs of the method standards used (sampling, sample processing, laboratory testing, on-site testing); The third is to be effective.
If the laboratory conducts microbiological testing, the plan also includes special requirements in the field of microbiological testing, such as control of culture medium, verification of bacterial strains, and monitoring of environmental conditions. The quality control plan for on-site monitoring is easy to formulate, but difficult to implement effectively. It is important to cooperate with effective quality supervision. The quality control plan for on-site testing should be based on the characteristics of different fields, including water, air, sound, soil, etc. Quality control requirements should be formulated according to the corresponding specifications according to the characteristics of different fields, such as the rationality of point setting, the standardization of on-site sampling, and the representativeness of sample collection. If on-site testing can directly obtain testing data, calibration and calibration of the instrument before (after) use should be carried out according to requirements to ensure accurate results. In addition, statistical techniques can also be used to review the test results.
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