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Karl Fischer titration: When to use volumetry or coulometry

Dec 11, 2023

Article

You may have questioned whether to use volumetric or coulometric titration to analyze a sample. This blog article explains the most important factors to consider in order to choose the optimal Karl Fischer titration technique. To begin, the main difference between volumetry and coulometry is discussed: the «addition» of the iodine.

Volumetry

As the name suggests, volumes are crucial in volumetric KF titration. Why is that? 

The water content of the titrated sample is calculated based on the total dosed volume of the titrant up to the endpoint. This requires accurate and reproducible dosing. 

Metrohm titrators offer between 10,000 and 100,000 pulses per buret volume—more than enough to guarantee accurately dosed volumes.

OMNIS Solvent Module, Karl Fischer Titration