ISO 3240:1975
Sodium sulphate for industrial use; Determination of acidity or alkalinity
- Standard No.
- ISO 3240:1975
- Release Date
- 1975
- Published By
- International Organization for Standardization (ISO)
- Status
- 2002-05
- Latest
- ISO 3240:1975
- Scope
- Relates to the analysis of a possible excess of acidity or alkalinity. Detection by dissolution of a test portion in water. Addition of a known excess of standard volumetric suphuric acid solution in the presence of methyl red. Elimination of the carbon dioxide by boiling. Titration of the excess of acid with standard volumetric sodium hydroxide solution. Calculation expressed as sulphuric acid or sodium carbonate depending on whether the quantity of acid found is higher or less than the known quantity introduced.
ISO 3240:1975 history
- 1975 ISO 3240:1975 Sodium sulphate for industrial use; Determination of acidity or alkalinity
