水中氨氮检测能力验证考核活动回顾性评价 A Retrospective Review on the Proficiency Testing (PT) for the Detection of Ammoniac Nitrogen in Water

参加了“2016年水利系统水质监测机构水中氨氮检测能力验证”考核活动，采用纳氏试剂分光光度法进行检测并提交数据，验证结果为满意。为进一步提高实验室检测能力及质量管理水平，对此次考核活动检测过程及结果进行回顾性评价。结果表明，创新性提出以浓度预判为基础、突出预防优先、强调数据评估的全过程质量控制理念是此次考核成功的重要保障，以此为基础制定合理的考核方案并对考核过程及考核结果进行标准曲线、精密度、准确度等自我评估，可有效减少测定误差、确保考核活动获得满意结果。 The detection of ammoniac nitrogen is the measurement of certification projects must be implemented by the water environment monitoring laboratory. After participated the “2016 proficiency testing (PT) for the detection of ammoniac nitrogen in water for the environmental monitoring laboratory in water conservancy system” assessment activities, the Nessler reagent spectrophotometric method was used to detect and submit data to verify the results for the satisfaction. In order to improve the proficiency and quality management level of the laboratory, this paper retrospectively reviews the process and results of the proficiency testing (PT). The results show that the innovation is based on the pre-determination of the concentration, highlighting the priority of prevention, emphasizing the whole process of quality assessment of data assessment concept is an important guarantee for the success of this assessment, as a basis for the development of a reasonable assessment program and assessment process and assessment. The results of the standard curve, precision, accuracy and other self-assessment can effectively reduce the measurement error, which ensures that the assessment activities to obtain satisfactory results.