ISO 5437:1992
Acid-grade and ceramic-grade fluorspar; determination of barium sulfate content; gravimetric method
- Standard No.
- ISO 5437:1992
- Release Date
- 1992
- Published By
- International Organization for Standardization (ISO)
- Status
- Latest
- ISO 5437:1992
- Scope
- The method is based on evaporation to dryness of a test portion in the presence of hydrofluoric acid and concentrated sulfuric acid, extraction of the soluble salts from the mixture, filtration, drying and weighing of the residual barium sulfate. Applies to products having barium sulfate contents equal to or greater than 0,1 % (m/m).
ISO 5437:1992 history
- 1992 ISO 5437:1992 Acid-grade and ceramic-grade fluorspar; determination of barium sulfate content; gravimetric method
- 1988 ISO 5437:1988 Acid-grade and ceramic-grade fluorspar — Determination of barium sulfate content — Gravimetric method
