温度滴定法测定导热油中总酸值  

Determination of Total Acid Number in Heat Transfer Oils by Thermometric Titration

作　　者：彭佩岚 张晓 

机构地区：[1]广东省特种设备检测研究院中山检测院,广东中山528403

出　　处：《广东化工》2017年第6期152-153,176,共3页Guangdong Chemical Industry

摘　　要：以导热油为样品,利用瑞士万通859温度滴定仪,建立了油品中总酸含量的测定方法,且与自动电位滴定方法进行了对比。测试结果表明,温度滴定法测得样品中总酸含量在0.13 mg KOH·g^(-1)~2.2 mg KOH·g^(-1)之间,样品相对标准偏差值(RSD)均在1.5%以下。利用温度滴定原理测定油品中总酸方法准确可靠,终点突跃明显,重复性良好,适用于导热油等复杂基质样品中总酸测定,且可实现全自动测样分析。Total acid number in heat transfer oils was determined by 859 thermometric titrator of Metrohm. Fundamental and procedures of thermometric titration and potentiornetric titration were compared. The total acid number of samples is among 0.13 mgKOH.g-1 and 2.2 mgKOH.g-1, the RSD is below 1.5%. The analysis results of thermometric titration demonstrate that it is feasible, clear end point, good replication to determine the total acid number of heat transfer oils by thermometric titration. It can realize automatic analysis,

关 键 词：温度滴定 导热油 总酸 焓 电化学 化学分析 

分 类 号：TQ016.1[化学工程]