Karl Fischer reagent
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United States of America Patent
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-
Jul 24, 2007
Grant Date -
N/A
app pub date -
May 18, 2000
filing date -
May 21, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
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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