氢氧化钡标准溶液浓度的不确定度评定

Uncertainty Evaluation of Concentration of Barium Hydroxide Standard Solution

以GB/T 601-2016、GB/T 8292-2008为依据,对0.005 mol/L的氢氧化钡标准滴定溶液的标定过程产生的不确定度进行了评定。结果表明,不确定度主要来源滴定体积,配制氢氧化钡浓度为0.004846 mol/L时,评定其扩展不确定度为0.000017 mol/L(κ=2)。

Based on GB/T 601-2016 and GB/T 8292-2008,the uncertainty in the calibration process of 0.005 mol/L barium hydroxide standard titration solution was evaluated.The results showed that the main source of uncertainty is titration volume.When the concentration of barium hydroxide is 0.004846 mol/L,the expanded uncertainty is 0.000017 mol/L(κ=2)