论文部分内容阅读
采用《标准滴定溶液的制备》,对乙二胺四乙酸二钠标准滴定溶液的不确定度进行了评定。分析了不确定度的主要来源,包括质量,质量分数,体积,摩尔质量及重复性引起的不确定度,并评估了测量结果的标准不确定度和扩展不确定度,从而得出结论:配制浓度为0.04073mol/l的EDTA标准溶液,其合成标准不确定度为0.000090mol/l,而扩展不确定度为0.00018mol/L,完全达到配置EDTA标准滴定溶液的要求。
Using the “standard titration solution preparation”, the uncertainty of the standard titration solution of disodium ethylenediaminetetraacetate was evaluated. The main sources of uncertainty were analyzed, including the uncertainty caused by mass, mass fraction, volume, molar mass and repeatability, and the standard uncertainty and extended uncertainty of measurement were evaluated. It was concluded that the formulation EDTA standard solution with the concentration of 0.04073mol / l, the synthetic standard uncertainty of 0.000090mol / l, and the extended uncertainty of 0.00018mol / L, fully meet the requirements of EDTA standard titration solution.