Numéro de référence
ISO 2866:1974
ISO 2866:1974
© ISO 2025
ISO 2866:1974
Soufre à usage industriel — Dosage du carbone total — Méthode titrimétrique
Edition 1
1974-11
1974-11
Annulée
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.