International Standard
ISO 6374:1981
Cryolite, natural and artificial, and aluminium fluoride for industrial use — Determination of phosphorus content — Atomic absorption spectrometric method after extraction
Reference number
ISO 6374:1981
Edition 1
1981-10
© ISO 2024
International Standard
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Published (Edition 1, 1981)
This standard was last reviewed and confirmed in 2024. Therefore this version remains current.

ISO 6374:1981

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CHF 42
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Abstract

Specifies a method based on the fusion of a test portion with sodium carbonate and boric acid and dissolution in perchloric acid solution, followed by formation of the ammonium molybdophosphate complex and extraction of the complex with isobutyl acetate. The solution is absorbed into an acetylene/dinitrogen monoxide flame and the molybdenum, and hence the phosphorus, is determined by measuring the absorbance of the 379,8 nm line emitted by a molybdenum hollow-cathode lamp.

General information

  • Status
     : Published
    Publication date
     : 1981-10
    Stage
    : International Standard confirmed [90.93]
  • Edition
     : 1
    Number of pages
     : 4
  • Technical Committee :
    ISO/TC 226
    ICS :
    71.060.50 
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