ISO 684:1974

Analysis of soaps — Determination of total free alkali ISO 684:1974

Publication date:   Nov 1, 1974

General information

90.93 Standard confirmed   Jan 11, 2022

ISO

ISO/TC 91 Surface active agents

International Standard

71.100.40   Surface active agents

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Published

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Scope

The soap is dissolved in an ethanolic solution, the free alkali is neutralized with a known excess of sulphuric acid solution and the excess acid is titrated with ethanolic potassium hydroxide solution. The method is not applicable if the soap cantains additives (alkali, silicates, etw.) which can be decomposed by sulphuric acid by the procedure specified. The method is also not applicable to coloured soaps if the colour interferes with the phenolphthalein end point.

Life cycle

NOW

PUBLISHED
ISO 684:1974
90.93 Standard confirmed
Jan 11, 2022

REVISED BY

ABANDON
ISO/WD 684