衣料用液体洗涤剂中总活性物含量的不确定度评定

Evaluation of Uncertainty in Measurement on the Content of Total Active Matter in Liquid Detergent for Fabric

对衣料用液体洗涤剂中总活性物的不确定度来源进行了详细的分析和测定过程中的主要不确定度分量进行了合理评定,包括样品质量称量引入的不确定度;称量乙醇溶解物质量引入的不确定度;硝酸银标准溶液的标准浓度引入的不确定度;数字滴定器引入的不确定度以及测量的重复性所引入的不确定度,最后合成标准不确定度乘以95%置信概率下的扩展因子k=2获得测量结果的不确定度。

The sources of uncertainty in measurement on the content of total active matter in liquid detergent for fabric were analyzed in detail, the determination of the main components of uncertainty were reasonable assessment. Including the uncertainty of the sample weighing; the uncertainty of the ethanol dissolved weighing uncertainty; the uncertainty of the concentration of silver nitrate standard solution; the uncertainty of digital titration and the uncertainty of the repeated measurement. Combined the standard uncertainty, and the combined standard uncertainty multiplied by the spreading factor of 95 % confidence probability k=2 is uncertainty in measurement.