Numéro de référence
ISO 4283:1993
ISO 4283:1993
© ISO 2025
ISO 4283:1993
Tous les spaths fluor — Dosage des carbonates — Méthode titrimétrique
Edition 3
1993-01
1993-01
Annulée
Résumé
The principle of the method specified is treatment of a test portion with hydrochloric acid solution, absorption of the evolved carbon dioxide in barium hydroxide solution, neutralization of excess alkali with hydrochloric acid solution, addition of an exactly measured excess of a standard volumetric hydrochloric acid solution to dissolve the precipitated barium carbonate and back-titration with a standard volumetric sodium hydroxide solution using methyl orange as indicator. The method is applicable to products having carbonate contents equal to or greater than 0,04 % (m/m).
Cycle de vie
-
Précédemment
AnnuléeISO 4283:1978
AnnuléeISO 4283:1990
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Actuellement