盐酸标准滴定溶液不确定度的评定

Evaluation of Uncertainty of Standard Titration Solution of Hydrochloric Acid

采用直观的因果图,以GB/T601《化学试剂标准滴定溶液的制备》中0.1mol/L盐酸标准滴定溶液的标定为例,根据JJF1059《测量不确定度评定与表示》分析估计不确定度的来源,通过建立有效的数学模型,考虑了重复性、基准无水碳酸钠的纯度、电子分析天平、标定体积、基准无水碳酸钠的摩尔质量各不确定度分量,利用各相对标准不确定度分量评定了该测量的不确定度。

Using the intuitive causal map, the calibration of 0.hnol/L hydrochloric acid standard titration solution inGB/T601 ＂Preparation of Chemieal Reagent Standard Titration Solution＂ is taken as an example.Aeeording to JJF1059 ＂Measurement Uncertainty Evaluation and Representation＂ , the estimation uneertainty is estimated.The source of thedegree, by establishing an effective mathematical model, taking into account the reproducibility, the purity of the referenceanhydrous sodium earbonate, the eleetronie analytieal balanee, the ealibration volume, the molar mass of the refereneeanhydrous sodium carbonate, the uncertainty component, using the relative standards The deterministic componentassesses the uncertainty of the measurement.