International Organization for Standardization (ISO)
Status
2002-05
Latest
ISO 2364:1972
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 2364:1972 history
1972ISO 2364:1972 Ammonium nitrate for industrial use; Determination of free acidity; Volumetric method