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目的通过组织实验室水样氟化物质控考核工作,了解所辖基层实验室测定氟化物的技术能力和水平,以更好地制定技术指导和培训方案,提高全市疾控实验室的检测水平。方法使用有证氟化物标准贮备液稀释配制成3个不同浓度水平的质控样品,抽取样品进行均匀性和稳定性考察,判定是否符合能力验证和质控样品的要求。随机发放样品给各个实验室,要求依照《生活饮用水标准检验方法》中相应的方法检测;测定结果用标准值±不确定度评价法进行评价,分为满意、不满意两种结论。结果经过对3个不同浓度质控样品的均匀性和稳定性检验和评价,符合能力验证比对样品的要求,可以作为质控样品进行实验室能力评价。此次对全市11家疾控实验室水样氟化物质控考核中,结果满意率91%;通过仔细查看上报的技术资料,发现不少细节问题需要注意。结论利用有证标准贮备液在实验室内可根据需要制备多个浓度水平的质控样品,与单一浓度水平相比,可以有效起到区分作用并达到验证能力的目的;本次结果考核满意率较高,但部分实验室人员的基础理论知识和实际应用能力有待提高。
Objective To understand the technical capability and level of fluoride determination in grassroots laboratories under the jurisdiction of the organization through laboratory tests of fluoride control in water samples in order to better formulate technical guidance and training programs and improve the detection level of the city’s disease control laboratories. Methods Standard quality control samples were prepared by diluting the standard stock solution of certified fluoride into three different concentration levels. Samples were taken for homogeneity and stability to determine whether they meet the requirements of proficiency testing and quality control samples. Randomly distributed samples to various laboratories, according to “drinking water standard test method” in the corresponding method of testing; measurement results using standard value uncertainty evaluation method, divided into satisfaction, not satisfied with the two conclusions. Results After the homogeneity and stability test of three different quality control samples, they met the requirement of proficiency testing to the samples and could be used as quality control samples to evaluate the laboratory ability. The city’s 11 disease control laboratory fluoride test control of water samples, the results were 91% satisfaction rate; by carefully reviewing the reported technical information and found that many details need attention. Conclusion The use of certified standard stock solution in the laboratory can be prepared according to the needs of multiple concentration levels of quality control samples, compared with the single concentration level, can effectively distinguish between the role and to verify the ability of the purpose of this test assessment of satisfaction rate Higher, but some of the laboratory personnel basic theoretical knowledge and practical ability to be improved.