氢氧化钠标准溶液浓度的不确定度评估

The Evaluation of Uncertainty of Sodium Hydroxide

研究氢氧化钠标准溶液浓度标定过程中的不确定度,通过数学模型评估不确定分量。结果表明:氢氧化钠标准溶液浓度的相对扩展不确定度为0.5076±0.0009mol/L(k=2);氢氧化钠标准溶液所消耗体积的不确定度影响最大。

The uncertain in the calibration process of sodium hydroxide standard solution concentration was studied and uncertainty components were evaluated by mathematical models.The results showed:the relative expanded uncertainty of sodium hydroxide stangard solution concentration was 0.5076±0.0009 mol/L(k=2).The uncertainty of the volume of sodium hydroxide standard solution was the largest influence.