连续流动分析法测定水中总氮的不确定度评定

摘要

在实验室分析基础上,对连续流动分析法测定水中总氮过程的不确定度进行评定。本文建立了数学模型,对不确定度来源进行了分析,并计算了不确定度分量、合成不确定度及扩展不确定度,最后给出了总氮测量结果的标准表示方法。%On the basis of laboratory analysis, the uncertainty for determination of total nitrogen in water by continuous flow analysis was evaluated. In this paper, a mathematical model was established and the uncertainty source was analyzed, and then the components of uncertainty, synthetic uncertainty and expanded uncertainty were calculated. Finally a standard expression for determination result of total nitrogen was given.