ISO/TC 47 Chemie,
ISO/TC 47 Chemistry,
ISO/TC 47 Chimie,
ISO Internationale Organisation für Normung,
ISO International Organization for Standardization,
ISO Organisation Internationale de Normalisation
ISO 7105
: Liquefied anhydrous ammonia for industrial use; Determination of water content; Karl Fischer method
- [1985-06-00]
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Medientyp:
Norm
Titel:
ISO 7105
:
Liquefied anhydrous ammonia for industrial use; Determination of water content; Karl Fischer method
Weitere Titel:
Verflüssigtes wasserfreies Ammonium für Industriezwecke; Bestimmung des Wassergehaltes; Karl-Fischer-Methode
Ammoniac anhydre liquéfié à usage industriel; Dosage de l'eau; Méthode de Karl Fischer
Anmerkungen:
Internationale Übereinstimmung mit: NBN T 03-094 (1988), IDT*BS 4431 (1969-02-28), NEQ*BS 4431 (1989-06-30), NEQ*GB/T 8570.5 (1988), IDT*GB/T 8570.5 (2010), MOD*NF T20-342 (1986-08-01), IDT*KS M ISO 7105 (2002-12-17), IDT*KS M ISO 7105 (2017-12-29), IDT*GOST 28326.2 (1989), IDT*TS 7541 (1989-10-31), IDT*STN 65 1312-2 (1990-09-15), NEQ
Beschreibung:
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.