氟离子选择电极法测定氟离子不确定度评定

Uncertainty evaluation for the determination of fluoride ion by fluoride ion selective electrode method

中文关键词:  氟离子  选择电极法  不确定度

英文关键词:fluoride ion  select electrode method  uncertainty

中文摘要:

      目的 评估氟离子选择电极法测定氟离子的不确定度。方法 依据JJF 1059.1-2012《测量不确定度评定与表示》、CNAS-GL006: 2019《化学分析中不确定度的评估指南》等标准, 首先识别不确定度来源和建立测量模型, 再根据不确定度来源逐一评估每一个分量的不确定度。分别计算A类标准不确定度、B类标准不确定度、合成标准不确定度、扩展不确定度。结果 氟离子的测量结果为3.9 mg/kg, A类标准不确定度为0.1902 mg/kg, B类标准不确定度为0.01302 mg/kg, 合成标准不确定度为0.1969 mg/kg, 扩展不确定度为 0.4 mg/kg (k=2)。结论 不确定度的主要来源为A类的不确定度。

英文摘要:

      Objective To evaluate the uncertainty of fluoride ion measurement by fluoride ion selective electrode method. Methods According to JJF 1059.1-2012 Evaluation and representation of measurement uncertainty, CNAS-GL006: 2019 Guidance for the evaluation of uncertainty in chemical analysis and other standards, firstly, the source of uncertainty was identified and the measurement model was established, and then the uncertainty of each component was evaluated one by one according to the source of uncertainty. The A standard uncertainty, the B standard uncertainty, the composite standard uncertainty, and the expanded uncertainty were calculated respectively. Results The measurement result of fluoride ion was 3.9 mg/kg, type A standard uncertainty was 0.1902 mg/kg, type B standard uncertainty was 0.01302 mg/kg, the combined standard uncertainty was 0.1969 mg/kg, and the expanded uncertainty was 0.4 mg/kg (k=2). Conclusion The main source of uncertainty is the type A uncertainty.