Chemical Testing Service Moisture analysis by Karl Fischer (KF) coulometric titration

Chemical Testing Service Moisture analysis by Karl Fischer (KF) coulometric titration

Moisture analysis by Karl Fischer (KF) coulometric titration is a highly accurate and widely used technique for determining the water content in a sample. Named after its inventor, the chemist Karl Fischer, this method relies on the principle of coulometric titration to quantify the amount of water present.

In this technique, the sample is dissolved or dispersed in a suitable solvent that reacts with water. The titration cell contains a reagent solution comprising iodine, sulfur dioxide, and a base, which reacts with water to produce iodide ions. The iodide ions are then oxidized at an electrode, generating an electric current proportional to the amount of water present in the sample.

The coulometric titration method offers several advantages for moisture analysis, including high sensitivity, wide dynamic range, and minimal interference from other substances in the sample. It is particularly well-suited for analyzing samples with low water content or for determining moisture levels in volatile or hygroscopic materials.

KF coulometric titration is commonly used in industries such as pharmaceuticals, petrochemicals, food and beverages, and environmental analysis, where precise control of moisture content is critical for product quality, safety, and regulatory compliance.

List of solvents for water content/moisture analysis by K-F method Acetic Acid Ammonium Hydroxide BOE / BHF’s Citric Acid Hydrochloric Acid Hydrofluoric Acid 49% Hydrogen Peroxide Lithium Hydroxide NH4F Nitric Acid Phosphoric Acid Potassium Carbonate Potassium Hydroxide SC1 SC2 Slurries Sodium Hydroxide Sulfuric Acid Acetic Acid Ammonium Hydroxide BOE / BHF’s Citric Acid Hydrochloric Acid Hydrofluoric Acid 49% Hydrogen Peroxide Lithium Hydroxide NH4F Nitric Acid Phosphoric Acid Potassium Carbonate Potassium Hydroxide SC1 SC2 Slurries Sodium Hydroxide Sulfuric Acid Isoamyl alcohol Isobutyl isobutyrate MEK Methanol Methyl isobutyl carbinvol Methyl methoxy propionate MIBK MPK NBA n-Butanol NMP n-Propanol Toluene Propylene Glycol Directions for ordering a chemical test service.

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