What is KF reaction?
The fundamental principle behind it is based on the Bunsen Reaction between iodine and sulfur dioxide in an aqueous medium.
Karl Fischer discovered that this reaction could be modified to be used for the determination of water in a non-aqueous system containing an excess of sulfur dioxide..
Why is DST used in KF factor?
DST is primary standard and it is stable up to 150 degree Centigrade. It release free water molecules easily when reacts with KF reagent. … This DST has 15.66% water molecules so we can easily calculate and standardize the KF reagent. We use the factorof DST the compound which has less than 1% of moisture.
What is difference between KF and Lod?
Comparing LOD with KF Titration The LOD is based on physical mass determination after the escape of volatilized moisture, including fats and water. KF titration is a chemical reaction with the water in a sample.
What is pyridine free KF reagent?
The pyridine-free Karl Fischer reagent consists of two solutions, a dissolving agent and a titrating agent. The dissolving agent contains sulfur dioxide and a pyridine substitute in a solvent and is used for taking up the sample to be investigated with respect to its water content.
How do you calculate kf factor?
The water equivalence factor F, in mgs of H2O per ml of reagent, is calculated according to the formula 0.1566 x w/v, where W is the weight in mgs of sodium tartrate and V is the volume in ml of the reagent.
What is kf factor limit?
in which F is the water equivalency factor of the Reagent, in mg per mL; C is the used volume, in percent, of the capacity of the buret; V is the buret volume, in mL; and KF is the limit or reasonable expected water content in the sample, in percent.