Determination of ester value of oils containing difficult-to-saponify esters

رقم المستند: NL ISO 7660 : 2017
القطاع: chemical technology
TC: NL TC 54
ICS: 71.100.60
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.