Abstract / scope
The method consists in calcination of a test portion in the presence of sulphuric acid solution and weighing of the ash in form of sulphate.
ISO 4322:1977Published
Non-ionic surface active agents — Determination of sulphated ash — Gravimetric method
Agents de surface non ioniques — Détermination du taux de cendres sulfatées — Méthode gravimétrique
A new edition is under development: ISO/CD 4322.