Reference number
ISO 2121:1972
ISO 2121:1972
© ISO 2024
International Standard
ISO 2121:1972
Liquid chlorine for industrial use — Determination of water content — Gravimetric method
Edition 1
1972-07
1972-07
ISO 2121:1972
6914
Published
(Edition 1, 1972)
This publication was last reviewed and confirmed in 2023.
Therefore this version remains current.
Abstract
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.