滴定液扩展不确定度的评定

Evaluation of expanded uncertainty of titrant

中文关键词:  滴定液  标定  不确定度

英文关键词:titrant  calibration  uncertainty

中文摘要:

      目的 建立滴定液标定浓度不确定度的评定方法。方法 通过不确定度来源分析, 建立滴定液不确定度的数学模型, 从A类不确定度和B类合成不确定度两个方面进行评定, 并对各不确定度的分量进行评估和计算公式的确认。结果 计算各变量的不确定度, 由此计算合成不确定度, 最终得到测定结果的扩展不确定度和置信水平。结论 对滴定液的各个不确定度的分量进行分析, 确定各个分量的计算公式, 为滴定液的标定不确定度提供一种具体、准确的评估方法; 减小滴定液引起的误差, 使实验获得更准确的结果。

英文摘要:

      Objective To establish a method for the uncertainty assessment of the titrant. Methods The sources of uncertainty were analyzed, and the mathematical model of uncertainty of titrant was set up. The expanded uncertainty of titrant was evaluated according to the degree of uncertainty of class A and class B, each component of uncertainty was evaluated, and the calculation formulas were confirmed. Results The uncertainty of each variable was calculated, then the synthesis uncertainty was calculated, and finally the expanded uncertainty of the determination results and the confidence level were obtained. Conclusion This experiment analyzed each component of uncertainty of the titrant and confirmed the formula of the various components, providing a specific and accurate assessment method for the evaluation of uncertainty of titrant which can reduce the titrant deviation so as to obtain more accurate results.