Factors likely to cause differences in moisture values include the condition of the samples, the use of something other than appropriate Karl Fischer reagents on the samples, and equipment malfunction. Check the following information.
FAQKarl Fischer Moisture Titrators
Karl Fischer Moisture Titrators
Q
The same samples were measured by clients and other departments, but there were differences in the moisture values.What causes this?
A
- Were appropriate Karl Fischer reagents used on the samples?
- Was the same brand of Karl Fischer reagents used? Depending on the sample, if different brands of Karl Fischer reagents are used, the measurement results might not match even for the same sample.
- Were the samples handled in the same way? (Samples prone to changes in moisture concentration)
- Was the same measuring instrument methodology used? (Volumetric titration type, coulometric titration type etc.)
- Was the measurement method the same? (Karl Fischer method, reduced pressure desiccation method, etc.)
- The moisture concentration must be normalized by measuring standard substances with known moisture concentrations such as water or standard items.
- Were the titration cell (titration flask) and electrodes contaminated? Clean these components, and then measure standard substances such as water or standard items.
