AB 101-200

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AB-137 Karl Fischer water determination with the KF Coulometer  
Karl Fischer water determination with the KF Coulometer

Coulometric water determination is primarily used for the determination of small amounts of water. Metrohm KF Coulometers work in a determination range from 10 μg...200 mg H2O with a resolution of 0.1 μg H2O. Larger amounts of water require a lot of time and/or may exceed the water capacity of the KF reagent, which produces inaccurate results. In coulometry the electric current is used to generate the reagent instead of a buret - resulting in a type of «electronic buret». The current releases, by electrolysis, the stoichiometrically equivalent amount of iodine from the iodine-containing KF reagent.


German:  AB_137_d.pdf (160 KB)

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Methods
Karl Fischer Titration > Automated coulometric KFT
Karl Fischer Titration > Direct coulometric KFT
   Karl Fischer water determination with the KF Coulometer