Potentiometric titration for the determination of oil acid value
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Potentiometric titration is used to analyze the acid value of lipid substances (including monoglycerides, diglycerides, triglycerides, and fatty acid methyl esters). Question 1: Which electrode to use? 2. Which solvent to use? 3. How long does it take to analyze a sample? (Acid value less than 5 mgKOH/g) I hope friends who are knowledgeable on this topic will kindly offer their guidance. Thank you!
For the determination of the acid value of such samples, non-aqueous titration is generally used, with a pH meter or potentiometer being employed to indicate the endpoint. Ethanol can generally be used as the solvent. The time required to analyze a sample depends on the operator’s proficiency, as well as the methods and instruments chosen. It might take half an hour, or half a day; sometimes not even one task can be completed in a day.