摘要
研究了用电位滴定法测定喷气燃料总酸值的方法。采用T50电位滴定仪对滴定剂的添加方式和终点的确定方式进行了研究,分析了非水测量电极和二氧化碳对测定结果的影响,确定了喷气燃料总酸值的最佳测定条件。电位滴定法测定结果的准确度满足指示剂法的再现性要求,多次测定结果的重复性满足格鲁布斯法检验要求。电位滴定法适用于喷气燃料总酸值的测定,尤其对低酸值或有颜色的样品,终点判断干扰小,比指示剂法测定结果准确度高。
A method for the determination of total acid number in jet fuel by potentiometric titration is presented. The adding mode of titrant and the determination of endpoint were studied by T50 potentiometric titrator. The effect of nonaqueous electrode and carbon dioxide on the experimental results was analyzed, and the optimal testing conditions were determined. The results of potentiometric titration were compared with those of indicator method, and its deviation was less than the reproducibility limit of indicator method. Repeatability of potentiometric titration was satisfied with Grubbs. Results showed that potentiometric titration was suitable to measure the total acid number of jet fuel, potentiometrie titration was more accurate than indicator method especially for measuring colored and low acidic samples.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2010年第5期77-80,共4页
Petroleum Processing and Petrochemicals
关键词
电位滴定
添加方式
总酸值
分析方法
potentiometric titration
adding mode
total acid number
analytical method
