Reference number
ISO 7660:1983
ISO 7660:1983
© ISO 2024
International Standard
ISO 7660:1983
Essential oils — Determination of ester value of oils containing difficult-to-saponify esters
Edition 1
1983-10
1983-10
ISO 7660:1983
14479
Published
(Edition 1, 1983)
This publication was last reviewed and confirmed in 2023.
Therefore this version remains current.
Abstract
The method consists in hydrolysis of the esters present in a test portion by heating in the presence of a standard volumetric solution of potassium hydroxide in dimethylsulfoxide, and back-titration of the excess potassium hydroxide with a standard volumetric solution of sulfuric acid or hydrochloric acid.