Reference number
ISO 3391:1976
International Standard
ISO 3391:1976
Cryolite, natural and artificial — Determination of calcium content — Flame atomic absorption method
Edition 1
1976-09
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ISO 3391:1976
8690
Published (Edition 1, 1976)
This publication was last reviewed and confirmed in 2020. Therefore this version remains current.

ISO 3391:1976

ISO 3391:1976
8690
Language
Format
CHF 42
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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.

General information

  •  : Published
     : 1976-09
    : International Standard confirmed [90.93]
  •  : 1
     : 4
  • ISO/TC 226
    71.060.50 
  • RSS updates

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