ISO 3391:1976
Cryolite, natural and artificial; Determination of calcium content; Flame atomic absorption method
- Standard No.
- ISO 3391:1976
- Release Date
- 1976
- Published By
- International Organization for Standardization (ISO)
- Latest
- ISO 3391:1976
- Scope
- Describes the preparation of the calibration graph and the dissolution of a test portion in concentrated sulphuric acid and heating on a hot-plate until the hydrofluoric acid has evaporated. Treatment of the residue with concentrated hydrochloric acid. Aspiration of the solution into an acetylene/dinitrogen monoxide flame and spectrophotometric measurement of the absorption of the 422.7-nm line emitted by a calcium hollow cathode lamp.
ISO 3391:1976 history
- 1976 ISO 3391:1976 Cryolite, natural and artificial; Determination of calcium content; Flame atomic absorption method
