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

Informace o normě:

Označení normy: ISO 3699:1976
Datum vydání normy: 1.8.1976
Počet stran: 6
Přibližná hmotnost: 18 g (0.04 liber)
Země: Mezinárodní technická norma
Kategorie: Technické normy ISO

Anotace textu normy ISO 3699:1976 :

Description / Abstract: 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.