摘要
依据JJF 1059.1-2012《测量不确定评定与表示》和CNAS-GL006:2019《化学分析中不确定度的评估指南》对电感耦合等离子体质谱(ICPMS)法测定饮用水中砷含量进行不确定度评定,量化各不确定分量,得出影响不确定的因素,为测量结果提供科学的依据。本实验测得饮用水中砷元素含量为0.75μg/L,当置信概率为95%,取包含因子k=2时,其扩展不确定度为0.18μg/L。从分析过程可知,测量结果的不确定度主要来源于校准曲线拟合和使用的仪器。
According to the requirements and methods of Guide to the Evaluation and Expression of Uncertainty in Measurement(JJF 1059.1-2012),and Guide for evaluation of uncertainty in chemical analysis for measuring uncertainty(CNAS-GL 006:2018),this article analyses the uncertainty of arsenic content testingin drinking water by ICPMS,and evaluated all the components of measuring uncertainty,in order to find out the influent factors and provide scientificbasis for the evaluation.The results show that when the content of arsenic in drinking water is 0.75μg/L,the expanded uncertainty is 0.18μg/L(k=2).From the analyzing process,we know that standard curve fitting and the testing instrument are the most important components to uncertainty component.
作者
林杰雄
袁嫣昊
Lin Jiexiong;Yuan Yanhao(Jiangmen Center for Disease Control and Prevention,Jiangmen 529000,China)
出处
《山东化工》
CAS
2021年第6期102-104,108,共4页
Shandong Chemical Industry
关键词
电感耦合等离子体质谱法
不确定度
砷
饮用水
inductively coupledplasma mass spectrometry
uncertainty
arsenic
drinking water
