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B51-14 (R2019) – Boiler, pressure vessel, and pressure piping code

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ISO 684:1974

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

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SKU: 128f23765bc9 Category:

Description

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.

Edition

1

Published Date

1974-11-01

Status

PUBLISHED

Pages

2

Language Detail Icon

English

Format Secure Icon

Secure PDF

Abstract

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.

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