Petroleum Chemistry

, Volume 57, Issue 12, pp 1099–1104 | Cite as

The Determination of Lower Acidity in Several Coloured Oils by Catalyzed Thermometric Titration

  • Jian-Qiang Hu
  • Shi-Zhao Yang
  • Jian-Jian Zhang
  • Li Guo
  • Yong-Liang Xin


A novel method of catalytic thermometric titration has been developed for the determination of the acidity of oils using titration with KOH in isopropanol as titrant. The amounts of oil, concentration and delivery rate of titrant, volumes and types of thermometric end-point indicator were investigated. The results show that mixture of acetone and chloroform used as indicator exhibits strongly exothermic effects to reflect end point obviously. The results obtained from the thermometric titration have good agreement with standard potentiometric and visual titration methods. The procedure is fast, easy to use, accurate, and highly reproducible to measure lower acidity in coloured oils. It is very suitable for the routine process and quality control of many types of oils.


acidity coloured oil catalytic thermometric titration determination 


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Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  • Jian-Qiang Hu
    • 1
  • Shi-Zhao Yang
    • 1
  • Jian-Jian Zhang
    • 1
  • Li Guo
    • 1
  • Yong-Liang Xin
    • 1
  1. 1.Department of Aviation OilAir Force Logistic CollegeXuzhouChina

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