Karl Fischer reagent

Details Karl Fischer reagent Karl Fischer reagent

2007-07-24

2007-07-24

Soderquist, Arlen (Department: 1743)

Chemistry: analytical and immunological testing

Determination of water

By use of a karl fischer reagent

C436S039000, C436S040000, C436S150000, C436S151000

Reexamination Certificate

active

09979313

ABSTRACT:
Karl Fischer reagent comprising iodide, sulphur dioxide with an initial concentration above 0.5 M, and imidazole/imidazole derivative dissolved in alcoholic solvent, whereby the molar ratio between the initial imidazole/imidazole derivative concentration and the initial sulphur dioxide concentration is above 10. The reagent contains a modifying substance that is an aliphatic hydrocarbon, or a primary or secondary alcohol, or a combination thereof. A method for the determination of water content by means of Karl Fischer coulometric titration in a diaphragm-free cell, whereby the Karl Fischer reagent is used, and the coulometric titration is carried out in a diaphragm-free cell. Use of the Karl Fischer reagent in a method for the determination of water content by means of coulometric titration.

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