ISO 2362:1972
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ISO 2362:1972
7201

Abstract 

The principle of the method consists in fusion of a test portion with sodium carbonate. Separation of fluorine by distillation with sulphuric acid. Titration with thorium nitrate solution using sodium alizarinsulphonate-methylene blue as indicator. Alternatively, the thorium nitrate titration may be made using only sodium alizarinsulphonate; the end-point being spectrophotometrically determined at 525 nm.


General information 

  •  :  Withdrawn
     : 1972-12
  •  : 1
     : 5
  •  : ISO/TC 47 Chemistry
  •  :
    71.060.50 Salts

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