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 No.
ISO 2871-2:1990
Release Date
1990
Published By
International Organization for Standardization (ISO)
Status
Replace By
ISO 2871-2:2010
Latest
ISO 2871-2:2010
Scope
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.

ISO 2871-2:1990 history

  • 2010 ISO 2871-2:2010 Surface active agents - Detergents - Determination of cationic-active matter content - Part 2: Cationic-active matter of low molecular mass (between 200 and 500)
  • 1990 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)
Surface active agents; detergents; determination of cationic-active matter content; part 2: cationic active matter of low molecular mass (between 200 and 500)



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