ISO 3391:1976
Cryolite, natural and artificial — Determination of calcium content — Flame atomic absorption method
OVERVIEW
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.
COMMENTS
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PRODUCT DETAILS
| Status | Current |
|---|---|
| Edition | 1976 |
| No. of Pages | 4 |
| ICS Classification | 71.060.50 Salts |
| Committee | ISO/TC 226 |
| Available for Purchase | For sale in Singapore only |
| Adoption | ISO |