University Chemistry ›› 2021, Vol. 36 ›› Issue (2): 1912028.doi: 10.3866/PKU.DXHX201912028

• Chemistry Laboratory • Previous Articles     Next Articles

Iodometry-Based Standardization of Iodine Value of Nut Oil: An Introduction of a Comprehensive Analytical Chemistry Experiment

Yan Deng()   

  • Received:2019-12-06 Accepted:2020-02-26 Published:2020-03-04
  • Contact: Yan Deng


A comprehensive analytical chemistry experiment was introduced: oil in nuts like walnuts and peanuts was extracted by organic solvent and the iodine value of these oil was standardized via indirect iodometry to evaluate the degree of unsaturation of nut oil. By using purification techniques like extraction, filtration and distillation, as well as typical titrimetry like iodimetric method, students can interpret the experimental principles with their basic theoretical knowledge. Furthermore, life-based problem solving enhances their ability to solve problems and arouses their interest in chemistry.

Key words: Nut oil, Iodimetric method, Iodine value, Analytical chemistry experiment