Numéro de référence
ISO 2121:1972
ISO 2121:1972
© ISO 2024
Norme internationale
ISO 2121:1972
Chlore liquide à usage industriel — Dosage de l'eau — Méthode gravimétrique
Edition 1
1972-07
1972-07
ISO 2121:1972
6914
Publiée
(Edition 1, 1972)
Cette publication a été révisée et confirmée pour la dernière fois en 2023.
Cette édition reste donc d’actualité.
Résumé
The method relates to the determination of the "volatile water", that which volatilizes at the same time as the chlorine. It is applicable to products having a water content greater than 0,0005 % (m/m). It should not be applied to samples stored in bottles subject to corrosion. The principle consists in absorption of the water by passing the gasified sample into tared absorbers containing phosphorus pentoxide or magnesium perchlorate. Elimination of the gaseous chlorine and volatile impurities by flushing with air or dry nitrogen heated to 80 °C. Absorption of the chlorine in a tared bottle containing sodium hydroxide solution. Weighing of the absorbers to determine, by difference from the original masses, the mass of water.