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Homepage>ISO Standards>ISO 3391:1976-Cryolite, natural and artificial — Determination of calcium content — Flame atomic absorption method
download between 0-24 hoursReleased: 1976
ISO 3391:1976-Cryolite, natural and artificial — Determination of calcium content — Flame atomic absorption method

ISO 3391:1976

ISO 3391:1976-Cryolite, natural and artificial — Determination of calcium content — Flame atomic absorption method

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Standard´s number:ISO 3391:1976
Pages:4
Edition:1
Released:1976
DESCRIPTION

ISO 3391:1976


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.
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