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Types of Karl Fischer titration:
Karl Fischer titration and Coulombic Karl Fischer titration are two techniques used by Karl Fischer titration to determine water content.
Volumetric Karl Fischer titration:
In volumetric titration, iodine is mechanically introduced into the solvent containing the sample through the burette of the titrator throughout the entire titration process. The volume of KF reagent consumed is used to calculate the amount of water consumed.
This method is used to determine the water content within the range of 100 ppm to 100%. Single component volume KF and two-component volume KF are two main types of volumetric KFT reagent systems.
Coulombic Karl Fischer titration:
In Coulombic titration, the titrant is generated electrochemically in the titration cell and the endpoint is detected electrochemically. The anodic oxidation of iodide in the solution provides the iodine required for the KF reaction.
The water level measured by colorimetric method is much lower than that measured by volumetric method. The traditional sintering pool, Coulomb KF, and melt free Coulomb KF are the two main types of Coulomb KFT reagent systems.
