ISO 2871-2:1990
Withdrawn
View Superseded by
Surface active agents — Detergents — Determination of cationic-active matter content — Part 2: Cationic-active matter of low molecular mass (between 200 and 500)
Hardcopy , PDF
English, French
11-22-1990
11-02-2025
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.
| Committee |
ISO/TC 91
|
| DocumentType |
Standard
|
| Pages |
4
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| SupersededBy |
| Standards | Relationship |
| UNE-EN ISO 2871-2:1995 | Identical |
| UNE 55843-2:1994 | Identical |
| BS 3762-3-3.4:1991 | Identical |
| BS EN ISO 2871-2:1994 | Identical |
Please Login or Create an Account so you can add users to your Multi user PDF Later.
Important note : All end users must be registered with an Account prior to user licenses being assigned.
Users cannot be edited or removed once added to your Multi user PDF.