What is KF titrant?
This is a specialized titration used as the most specific method of water content determination in a substance. Thus, the unknown to be determined is the percentage of water, the titrant is a specialized one called the KF reagent, and the end point is the consumption of the water in the analyte.
How does KF titration work?
How does it work? Water and iodine are consumed in a 1:1 ratio in the above reaction. Once all of the water present is consumed, the presence of excess iodine is detected voltametrically by the titrator’s indicator electrode. That signals the end-point of the titration.
How do you use a KF titrator?
Preparation of the KF Reagent Prepare a solution by mixing 670 mL of methanol and 170 mL of pyridine. Now, add 125 g of iodine to the solution and cool it. Then, take a 250 mL graduated cylinder and add 100 mL of pyridine to it. Keep the solution in an ice bath.
How do you standardize Karl Fischer?
A method using solid sodium tartrate dihydrate 15.66% and liquid water standard 10 mg/mL. One-component reagents contain all reactive compounds for the Karl Fischer reaction in one reagent, the titrant. Iodine, base, and sulfur dioxide are dissolved in alcohol to form the titrant.
What is KF water factor?
The water equivalence factor, F in mg of water per ml of the reagent is given by the expression 0.1566 w/v, where w is the weight, in mg, of the sodium tartrate and v is the volume, in ml, of the reagent required.
Can a KF titrator be used for volumetric titration?
In general, KF is conducted using a separate KF titrator, or for the volumetric titration, a KF titration cell will be installed into a general-purpose titrator. It is also possible to use the volumetric titration with visual detection of a titration endpoint with the coloured samples by UV or VIS spectrophotometric detection.
What do you need to know about Karl Fischer titrators?
This compact Karl Fischer titrator combines ease of use with accuracy, reliability, and safety offering Swiss-made quality at a convenient price. Simple and intuitive operation: Select a pre-installed method and push the button. The titration is carried out automatically
Which is the best titrator for high water content?
KF Titrino plus Volumetric titrator for high water contents and coulometer for low water contents for basic applications. These robust instruments offer excellent value for money.
Why does KF titration use a double platinum electrode?
Ans. Because the iodine is in abundance, the reaction has reached its termination point. For an electrochemical indication of the endpoint, most of the complex KF titration technology uses a double platinum electrode, whereas the photometric and visual indications are still used.