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Status : Active
Standard Type : Main
Document No : ISO 1067:1974
Document Year : 1974
Pages : 2
Edition : 1
Section Volume : Surface active agents (ISO/TC 91.)
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.