摘要
利用电位滴定法测定润滑油中酸值,建立了电位滴定法测定酸值的数学模型,分析了不确定度来源,评定了电位滴定法测定润滑油酸值的不确定度。通过重复性试验,测定齿轮油酸值为0.706mg/g,对该结果进行了A类和B类不确定度评定,当包含因子为k=2置信水平为95%时,扩展不确定度为0.010mg/g。
Acid number in lubricating oil was measured by potentiometric titration. Establishing evaluation mathematical model of uncertainty of acid number test results to analyze the sources of uncertainty,the test results were evaluated. The acid number of the Mobil gear oil by potentiometric titration is 0. 706 mg/g through repeated experiment.Type A and type B uncertainties of the result were evaluated,it showed that expanded uncertainty is 0. 010 mg/g when coverage factor is k = 2 and level of confidence is 95%.
作者
丘晖饶
庞晋山
QIU Hui-rao;PANG Jin-shan(Guangzhou Mechanical Engineering Research Institute Co.LTD,Guangzhou,Guangdong 510530,China)
出处
《计量学报》
CSCD
北大核心
2019年第5期937-940,共4页
Acta Metrologica Sinica
基金
国机集团重大科技专项(SINOMAST-ZDZX-2017-01-05)
广东省省级科技计划(2016B020245001)
关键词
计量学
酸值
润滑油
电位滴定
不确定度评定
metrology
acid number
lubricating oil
potentiometric titration
uncertainty evaluation
