Résumé
Gives the potentiometric and visual methods als alternatives for the final titration. The principle consists in the combustion of the sulphur in a current of oxygen. Oxidation and fixation of the sulphur dioxide and trioxide gases in chromic and sulphuric acid solutions. Absorption of the carbon dioxide formed in a solution of barium hydroxide, followed by titration in the presence of phenolphthalein and screened methylorange (by xylene cyanol FF) as indicator. Has also been approved by the IUPAC.
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État actuel: AnnuléeDate de publication: 1974-11
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Edition: 1Nombre de pages: 5
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- ICS :
- 71.060.10 Éléments chimiques
Cycle de vie
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