Résumé
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.
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État actuel: AnnuléeDate de publication: 1972-12
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Edition: 1Nombre de pages: 5
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- ICS :
- 71.060.50 Sels
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