引用本文:顾晓明,杨倩,孙梦远,张晓赟.利用质控数据评定AFS法测定水中汞的测量不确定度[J].环境监控与预警,2017,9(2):31-34
GU Xiao ming,YANG Qian, SUN Meng yuan, ZHANG Xiao yun.Uncertainty of Determination of Mercury in Water by AFS Method with Quality Control Data[J].Environmental Monitoring and Forewarning,2017,9(2):31-34
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利用质控数据评定AFS法测定水中汞的测量不确定度
顾晓明,杨倩,孙梦远,张晓赟
苏州市环境监测中心,江苏 苏州 215000
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0.82μg/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。
关键词:  统计检验  质控数据  原子荧光光度仪    不确定度
DOI:
分类号:O657.31;X832
文献标识码:B
基金项目:江苏省环保科研课题资助项目(SS201524)
Uncertainty of Determination of Mercury in Water by AFS Method with Quality Control Data
GU Xiaoming,YANG Qian, SUN Mengyuan, ZHANG Xiaoyun
Suzhou Environmental Monitoring Center, Suzhou, Jiangsu 215000,China
Abstract:
Based on the quality control data in 5 consecutive days, the measurement uncertainty of mercury in water by atomic fluorescence 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 0.82μg/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 component and no reference material available.
Key words:  Statistical test  Quality control data  AFS  Hg  Measurement uncertainty