Abstract / scope
The principle of the analysis consists in titration of a test portion with a standard sodium hydroxide solution in the presence of methyl red/methylene blue mixed indicator.
ISO 2364:1972Withdrawn
Ammonium nitrate for industrial use — Determination of free acidity — Volumetric method
Nitrate d'ammonium à usage industriel — Détermination de l'acidité libre — Méthode volumétrique