摘要
根据连续5天的质控数据,采用中国合格评定国家认可委员会(CNAS)的《利用质控数据评定化学检测领域测量不确定度》方法来评定原子荧光光度仪(AFS)法测定水中汞的不确定度。经过计算评定,在95%概率下AFS法测定水中汞的扩展不确定度为0.82μg/L。与传统的A、B类不确定度进行对比,利用质控数据评定测量不确定度法更适用于操作过程复杂、不确定度分量难确定的化学分析及无标准品的情况。
Based on the quality control data in 5 consecutive days, the measurement uncertainty of mercury in water by atomic fluo- rescence spectrometer （AFS） was evaluated using the method issued by Chinese National Accreditation Committee （CNAS）, which named ＂measurement uncertainty evaluation based on quality control data in chemical field testing＂. The expanded uncertainty was calculated to be 0.82μg/L at a 95% confidence level. Compared to A and B uncertainty, the measurement uncertainty based on quality control data is more appropriate to some complicated analysis or such condition as difficult to conform the uncertainty compo- nent and no reference material available.
出处
《环境监控与预警》
2017年第2期31-34,共4页
Environmental Monitoring and Forewarning
基金
江苏省环保科研课题资助项目(SS201524)
