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ISO 1067:1974 Analysis of soaps -- Determination of unsaponifiable, unsaponified and unsaponified saponifiable matter
standard by International Organization for Standardization, 06/01/1974
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The determination is carried out in the following way: Extraction of matter soluble in hexane, and titration of the free fatty acids removed, with potassium hydroxide solution. Saponification of products soluble in hexane neutralized in this way and extraction of the unsaponifiable matter by hexane.