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ISO 3391:1976

Cryolite, natural and artificial — Determination of calcium content — Flame atomic absorption method

NORM herausgegeben am 1.9.1976

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The information about the standard:

Designation standards: ISO 3391:1976
Publication date standards: 1.9.1976
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: International technical standard
Kategorie: Technische Normen ISO

Annotation of standard text ISO 3391:1976 :

Description / Abstract: 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.