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Updated: Jun 28, 2026

Determination of Carbonyl Functional Groups in Bio-oils by Potentiometric Titration: The Faix Method
Published on: February 7, 2017
Redox-potentiometric determination of peroxide value in edible oils without titration
E Kardash-Strochkova1, Y I Tur'yan, I Kuselman
1The National Physical Laboratory of Israel, Givat Ram, Jerusalem 91904, Israel.
Abstract:
Standard methods for peroxide value determination in edible oils, which are based on KI oxidation by the hydroperoxides and volumetric titration of the liberated iodine, have been improved using redox-potentiometric iodine determination without titration. Stages of the KI oxidation and redox-potentiometric measurements were combined in the same electrochemical cell. The limit of quantitation of the new method is 0.16 meq kg(-1), which allows the analysis of fresh refined oils. The method is simple, not time and labor consuming, and suitable for automation.
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