Active standard | Published: 01/09/1976

ISO 3391:1976

Cryolite, natural and artificial — Determination of calcium content — Flame atomic absorption method
(Cryolithe, naturelle et artificielle — Dosage du calcium — Méthode par absorption atomique dans la flamme)

Available languages: English, French

Available design: electronic design (pdf), Print design

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Detail information

Designation: ISO 3391:1976

Publication date: 01/09/1976

Pages: 4

Country: International technical standard

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Anotation

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.

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