Patent ID: 7247485

Claim:
A method for the determination of water content by means of Karl Fischer coulometric titration in a diaphragm-fee cell, whereby a Karl Fischer reagent, consisting essentially of iodide, sulphur dioxide, imidazole or an imidazole derivative, and a modifying substance for decreased production of oxidisable reduction products compared to a similar Karl Fischer reagent without said modifying agent, all dissolved in an alcoholic solvent, is used, and the coulometric titration is carried out in a diaphragm-free cell, characterized in that said Karl Fischer coulometric titration reagent is a reagent in which the initial sulphur dioxide concentration is above 0.5 M, the molar ratio between the initial imidazole or imidazole derivative concentration and the initial sulfur dioxide concentration is 10.5 or above, wherein the modifying substance is hexanol.