The determination is carried out in the following way: Decomposition of the soap with sulphuric acid, and extraction of the fatty acids with light petroleum. Oxidation of the glycerol by periodic acid to formic acid and formaldehyde, and titration of the formic acid produced using a pH meter.
Status: PublishedPublication date: 1975-05
Edition: 1Number of pages: 3
Technical Committee: ISO/TC 91 Surface active agents
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