Development of Karl Fischer Reagents

I-1. Questions & Answers about Karl Fischer Reagents
3. Check Solution P
Check Solution P is a solution of organic solvent containing a trace amount
of water (approximately 4mg/ml). It is used to adjust the end point of
coulometric titration by providing surplus water when free iodine is produced
in the electrolytes. It can also be used for day-to-day inspections of
coulometric titration systems. Since methanol is not used as the organic
solvent, this product can also be used with both general-purpose
Aquamicron products and products prepared for use with ketones.
Moisture Content Packaging
3.8-4.2mgH2O/ml 100ml glass bottles with septum caps
[Method of Use]
A red tinge in the anolyte solution indicates the presence of free iodine.
Normally, the measurement of moisture content cannot be initiated. In such
cases, Check Solution P is added to the anolyte as required (until the red
tinge disappears) to supply surplus water and turn all of the iodine into
iodide ions. The end point for the anolyte solution can be fine-tuned by
adding Check Solution P in 100ul increments until the red tinge disappears.
Titration is then started.
Check Solution P can also be used for day-to-day verification of moisture
meter. This is done by precisely measuring the moisture content of the
Check Solution P itself.
4. Water Standard Solution
Aquamicron Water Standard Solution is a water solution containing a
standard amount of water. It is used to verify coulometric moisture meters
and to determine the titer of KF reagents when used in volumetric moisture
meters. The following products are available.
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Product Application Packaging
Aquamicron Water Standard 0.2mg
Aquamicron Water Standard 1mg
Aquamicron Water Standard 10mg
Verification of moisture meters
(coulometric titration)
Verification of moisture meters
(coulometric titration)
Determination of titer of KF reagents
(volumetric titration)
5ml ampoules (10 per case)
5ml ampoules (10 per case)
8ml ampoules (10 per case)