Karl Fischer Titration

Karl Fischer titration is the reference method for measuring trace water content in liquids, solids, and gases, based on a quantitative redox reaction between water and iodine in the presence of sulfur dioxide and a base. As a hard skill it requires selecting volumetric or coulometric mode based on the expected water level, conditioning the instrument and preventing atmospheric moisture ingress, and verifying results with certified water standards. Battery researchers apply Karl Fischer titration to certify that electrolyte solvents and salts meet the sub-ppm moisture specifications required for reliable lithium-ion and lithium-metal cell performance.

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