Reference number
ISO 7105:1985
ISO 7105:1985
© ISO 2024
International Standard
ISO 7105:1985
Liquefied anhydrous ammonia for industrial use — Determination of water content — Karl Fischer method
Edition 1
1985-06
1985-06
ISO 7105:1985
13690
Published
(Edition 1, 1985)
This publication was last reviewed and confirmed in 2019.
Therefore this version remains current.
Abstract
A test portion is evaporated in the presence of ethanediol and the water content of the residue is determined by the Karl Fischer method with direct electrometric measurement. The method is applicable to products having water contents equal to or greater than 50 mg/kg. For water contents greater than 1000 mg/kg it is preferable to dilute the evaporation residue with anhydrous methanol in accordance with ISO 4276 and titrate an aliquot portion of the diluted solution.