亚硝酸钠滴定液标定的不确定度评估

Evaluation on the Uncertainty of Measurement of the Concentration of Sodium Nitrite Volumetric Solution

应用测量不确定度评定与表达的理论,以标定亚硝酸钠滴定液为例,分析了影响滴定液浓度测量不确定度的因素,包括标定过程中测量重复性、天平、滴定管、基准物纯度等因素,计算得出亚硝酸钠滴定液浓度测定结果的扩展不确定度为0.000 1 mol/L。

The factors that influence the uncertainty of measurement of volumetric solution concentration were analysed and evaluated using the theory of assessment and expression of uncertainty monitoring with the example of the concentration determination of sodium nitrite volumetric solution,they were repeatability of measurement results,balance,burette,the purity of standard reagent,etc.The expanded uncertainty was 0.000 1 mol/L.