溶液pH值测定的兽药检测实验室能力验证

为进一步提升实验室检测技术能力，加强实验室的质量管理，确保日常检验检测结果的准确性和可靠性，组织开展了全国省级兽药检验机构实验室间溶液pH值测定的能力验证。依据《中国兽药典》2015年版一部附录0631pH值测定法以及中国合格评定国家认可委员会（CNAS）规定的程序进行本次能力验证。采用单因子方差分析对制备的测试样品进行均匀性检验，采用t检验对样品进行稳定性考察，采用Z比分数评价各参加实验室的测试结果，以稳健统计的中位值作为指定值。参加本次能力验证的35家兽药检测实验室结果均为满意，表明承担兽药监督抽检和风险监测任务的单位整体具有较强的检验检测能力。

Laboratory proficiency testing of veterinary drug inspection for determination of pH value of solutions

In order to further improve the laboratory testing technology ability, strengthen the laboratory quality management, and ensure the accuracy and reliability of the daily test results, veterinary drug testing and other relevant institutions were organized to carry out the proficiency testing of pH value determination. This proficiency testing was carried out according to appendix 0631 of the Chinese Veterinary Pharmacopoeia (2015 edition) and the procedure prescribed by China National Accreditation Service for Conformity Assessment (CNAS). The homogeneity of the samples was tested by one-way ANOVA, and the stability of the samples was examined by t-test which met the requirements. The Z-score was used to evaluate the test results of the participating laboratories. The median values of robust statistics were used as the specified values. The results of 35 veterinary drug testing laboratories participating in this proficiency test were all satisfactory. The results showed that the units undertaking the tasks of veterinary drug random inspection and risk monitoring had strong inspection and detection ability.