柴油中总污染物含量测定的不确定度评定

Evaluation of Uncertainty in Determination of Total Contamination in Diesel Fuel

依据《中间馏分油、柴油及脂肪酸甲酯总污染物含量测定法(GB/T33400-2016)》,对车用柴油中总污染物进行了测定,以《测量不确定度评定与表示(JJF1059-2012)》和《石油石化领域理化检测测量不确定度的评估指南及实例》要求,采用《测量不确定度表示指南》(GUM)评定方法对柴油中总污染物测量结果的不确定度来源进行了分析和计算,得到测定方法重复性引入的不确定度是影响测试结果的主要因素,其次是数值修约,滤膜和试样称量的影响可以忽略不计。

According to "Determination of Total Contamination in Middle Distillates, Diesel Fuel and Fatty Acid Methyl Ester(GB/T 33400-2016)", "Evaluation and Expression of Uncertainty in Measurement(JJF1059-2012)", and "Guidance and Illustration on Uncertainty Estimation in Physical and Chemical Testing in the Field of Petroleum and Petrochemicals", the uncertainty of total contamination in vehicle diesel fuel is evaluated using the "Guide to the Expression of Uncertainty in Measurement(GUM)". The results show that the uncertainty comes mainly from the repeatability of the measurement method, and then from the numerical modification. The uncertainty caused by filter membranes and samples weighing can be neglected.