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

作　　者：冯真真 丁仕兵 秦玉姣 王兆锟 刘稚 徐恒 FENG Zhen-Zhen;DING Shi-Bing;QIN Yu-Jiao;WANG Zhao-Kun;LIU Zhi;XU Heng(Technology Center of Qingdao Customs,Qingdao 266500;China National Accreditation Service for Conformity Assessment,Beijing 10006287)

机构地区：[1]青岛海关技术中心,青岛266500 [2]中国合格评定国家认可中心,北京100062

出　　处：《中国口岸科学技术》2021年第1期87-91,共5页China Port Science and Technology

基　　金：国家重点研发计划(2018YFF0215400);中国合格评定国家认可中心科技项目(2018CNAS17);青岛海关科技项目(QK202035)。

摘　　要：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.

关 键 词：轻质石油产品 酸度 不确定度 评估 

分 类 号：TE626.24[石油与天然气工程—油气加工工程] O655.2[理学—分析化学]