分析测试中溶液体积测量的不确定度评定

Evaluation of Uncertainty in Measurement of Volume of Solution in Chemical Analysis

对环境温度与溶液体积变动性的关系进行阐述。不确定度评定中要正确区分温度对容量器皿容积和对溶液体积的影响。溶液体积变动性的不确定度应根据其配制后温度的变化来评定,与容量器皿的校正温度无直接关系。文中对溶液体积不确定度评定中一些误区进行深入讨论。

The effect of environmental temperature on the change of volume of solution was emphatically expounded. It was pointed out that correct differentiation between the volume of solution and volume of volumetric apparatus, i. e. , volumetric flask, pipet and etc, as affected by change of environmental temperature should be considered in the evaluation of uncertainty in measurement. Uncertainty in measurement of volume of solution should be evaluated according to change of temperature before and after its preparation, and it was not directly related with the temperature of calibration of volume of the volumetric apparatus. Some misreadings in the evaluation of uncertainty in measurement of volume of solution were discussed in depth.