Pyridine-free karl-fischer reagent and a process for the...

Details Pyridine-free karl-fischer reagent and a process for the... Pyridine-free karl-fischer reagent and a process for the...

G - Physics

01

N

150/7

G01N 33/18 (2006.01) G01N 31/16 (2006.01)

Patent

CA 1174951

ABSTRACT OF THE DISCLOSURE A pyridine-free Karl-Fischer reagent for the determination of water is provided herein. The reagent comprises a solvent solution containing sulfur dioxide and an amine in a Karl-Fischer reagent solvent, the amine being functionally equivalent to pyridine in a Karl-Fischer reagent, and a titrating agent containing iodine in a Karl-Fischer sol- vent. The molar ratio of amine to sulfur dioxide is from 2:1 to 1:1 and the reagent is essentially free of pyridine. Thus, a stable Karl-Fischer reagent has been provided which produces exact end points. The reagent is less toxic, causes less environmental pollution and is less expensive than conventional agents.

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