Analyse des savons — Détermination de la teneur en matières insaponifiables, en matières insaponifiées et en matières saponifiables insaponifiées

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.