ISO 2052:1976
Potassium chloride for industrial use; Determination of potassium content; Sodium tetraphenylborate titrimetric method
- Standard No.
- ISO 2052:1976
- Release Date
- 1976
- Published By
- International Organization for Standardization (ISO)
- Status
- 2002-05
- Latest
- ISO 2052:1976
- Scope
- The method is applicable to products having a minimum KCl content of about 95 % (m/m). The principle consists in dissolution of a test portion taken from the previously ground and sifted laboratory sample and elimination of many ammonium ions present. Precipitation of the potassium, in a slightly acid medium, by an excess of an standard volumetric sodium tetraphenylborate solution. Filtration and back-titration of this excess in the filtrate, with a standard volumetric solution of a quaternary ammonium salt, using bromphenol blue as indicator. Replaces ISO Recommendation R 2052-1971.
ISO 2052:1976 history
- 1976 ISO 2052:1976 Potassium chloride for industrial use; Determination of potassium content; Sodium tetraphenylborate titrimetric method
