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Abstract Preview

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

  • Status :  Published
    Publication date : 1976-09
  • Edition : 1
    Number of pages : 4
  • Technical Committee
    :
    ISO/TC 226
    Materials for the production of primary aluminium
  • ICS :
    71.060.50
    Salts

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  • CHF38

Life cycle

A standard is reviewed every 5 years



Revisions / Corrigenda

  • Now under review
    ISO 3391:1976

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