ISO 3699:1976

Current Revision
Anhydrous hydrogen fluoride for industrial use -- Determination of water content -- Karl Fischer method

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Anhydrous hydrogen fluoride for industrial use -- Determination of water content -- Karl Fischer method

PUBLISH DATE 1976

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 anhydrous hydrogen fluoride.

The apparatus for measuring the test portion and titration and the measuring vessel are shown in figures.

Subsequent electrometric titration of the water with the Karl Fischer reagent.

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