Determination of trace moisture in hydrogen chloride gas by Karl Fischer titration

摘要: Abstract Moisture of several ppm in hydrogen chloride gas has been accurately determined by a new method using the Karl Fischer reagent, which hitherto had limitation accuracy because partial reaction with when direct titration was employed. The moisture sample collected cold trap kept at about −80 °C while passed through and frozen dissolved pyridine-methanol (1:1) solvent. KF Reagent factoe: 0.35 mg H2O/ml. Titration reagent having equivalency factor of, e.g., 0.5 H2O/ml carried out concentration calculated from volume used.