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ISO 3699:1976

Anhydrous hydrogen fluoride for industrial use — Determination of water content — Karl Fischer method ISO 3699:1976

Publication date:   Aug 1, 1976

General information

90.60 Close of review   Dec 3, 2020

ISO

ISO/TC 226 Materials for the production of primary aluminium

International Standard

71.060.30   Acids

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Scope

Applicable to products having a water content between 0.01 % (m/m) and 0.5 % (m/m). Is supplemented by ISO 3700 and intended for reference purposes. Bases on addition of a cooled test portion to cooled dry pyridine containing 5 % of anhydous hydrogen fluoride. The apparatus for measuring the test portion and titration and the measuring vessel are shon in figures. Subsequent electrometric titration of the water with the Karl Fischer reagent.

Life cycle

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PUBLISHED
ISO 3699:1976
90.60 Close of review
Dec 3, 2020