Reference number
ISO 2868:1973
ISO 2868:1973
© ISO 2024
International Standard
ISO 2868:1973
Surface active agents — Detergents — Anionic-active matter stable to acid hydrolysis — Determination of trace amounts
Edition 1
1973-12
1973-12
ISO 2868:1973
7881
Publicado
(Edición 1, 1973)
Esta publicación se revisó y confirmó por última vez en 2022.
Por lo tanto, esta versión es la actual.
Resumen
The sample is hydrolyzed by refluxing under acid conditions. The non-hydrolyzable anionic-active matter is determined by the direct two-phase titration procedure describes in ISO 2271. This method is applicable to the determination of cyclic sulphonates in alkylphenol ether sulphates and of small amounts of sulphonates in sulphated fatty alcohols. The molar mass of the anionic matter must be known or previously determined, if its content is expressed as percentage by mass.