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ISO 2271:1989

Surface active agents — Detergents — Determination of anionic-active matter by manual or mechanical direct two-phase titration procedure

Oct 12, 1989

General information

90.20     Apr 15, 2026

ISO

ISO/TC 91

International Standard

71.100.40  

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Scope

The substance is determined in a medium consisting of an aqueous and a chloroform phase by titration with a standard volumetric cationic-active solution (benzethonium- chloride) in the presence of an indicator which consists of a mixture of cationic dye (dimidium bromide) and an anionic dye (acid blue 1). The method is applicable to solids or to aqueous solutions of the active material. The relative molecular mass of the anionic active matter has to be known. The method is not applicable if cationic surface active agents are present.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 2271:1972

NOW

PUBLISHED
ISO 2271:1989
90.20 Standard under periodical review
Apr 15, 2026

National adoptions

SRPS ISO 2271:1993  
ISS

Surface active agents — Detergents — Determination of anionic-active matter by manual or mechanical direct two-phase titration procedure

90.20   Standard under periodical review

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