轻质石油产品酸度测定结果不确定度评估

Evaluation of Acidity Uncertainty in Determination of Light Petroleum Products

依据国家标准《轻质石油产品酸度测定法》(GB/T 258-2016),以滴定法进行某车用柴油酸度的测定,对测定过程中的不确定度分量进行分析和评估。发现颜色指示剂法测量酸度结果不确定度主要来源于滴定溶液消耗体积和重复性测定。对此测定方法的准确性进行了科学的判断,并因此给予针对性的重视和改进。

According to the national standard of "Standard test method for determination of acidity of light petroleum products"(GB/T 258-2016), acidity of an automobile diesel fuel was measured by titration, and the acidity uncertainty was analyzed and evaluated. It was found that the major sources of uncertainty were from the volume of the standard solution used for titration and the determination repeatability. Then the accuracy of this method was judged scientifically, and should be given targeted attention and improvement.