Reference number
ISO 2271:1989
ISO 2271:1989
© ISO 2024
International Standard
ISO 2271:1989
Surface active agents — Detergents — Determination of anionic-active matter by manual or mechanical direct two-phase titration procedure
Edition 2
1989-10
1989-10
ISO 2271:1989
7094
Published
(Edition 2, 1989)
This publication was last reviewed and confirmed in 2021.
Therefore this version remains current.
Abstract
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
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Previously
WithdrawnISO 2271:1972
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Now