ISO 2871-2:1990

Surface active agents — Detergents — Determination of cationic-active matter content — Part 2: Cationic-active matter of low molecular mass (between 200 and 500)

Standard Details

The method is also suitable for other cationic-active materials. Not applicable if anionic and/or amphoteric surface active agents are present. The sample is titrated in a two-phase (aqueous chloroform) system against a standard anionic surface active agent in the presence of an indicator consisting of mixed anionic and cationic dyes. The cationic surface active agent present in the sample initially reacts with the anionic dye to form a salt which dissolves in the chloroform, imparting a blue colour to this layer. During the titration, the anionic surface active agent displaces the anionic dye and, at the end point, forms a salt with the cationic dye, imparting a greyish-pink colour to the chloroform layer.

General Information

Status : WITHDRAWN

Standard Type: Main

Document No: ISO 2871-2:1990

Document Year: 1990

Pages: 4

Edition: 1

Section Volume:
ISO/TC 91. Surface active agents

ICS:
71.100.40 Surface active agents

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WITHDRAWN

ISO 2871-2:1990

ISO 2871-2:1990

Standard Details

General Information

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