Evaporators configured for use with Karl Fischer moisture testers can provide added benefit when testing for moisture in samples that are not easily solubilized in the titration cell. In some cases even if it's possible to solubilize the sample in the titration cell you may find that it is better to use an evaporator to improve repeat testing by keeping the cell clean. While traditonal Karl Fischer moistutre testing is performed using a direct injection method where a syringe and needle is used to introduce the liquid sample into the titration cell, the use of evaporators follow a different approach.
Within the evaporator family there are SOLIDS EVAPORATORS that can range from 0 to 300 degree C as well as high heat solids evaporators that can range from 0 to 1,000 degree C.
A typical OIL EVAPORATOR will have a range from 0 to 300 degree C.
Solids evaporators will typically be used to measure moisture in these types of samples:
- plastic pellets (pte, etc)
- plastic parts (you can cut into smaller pieces with a pair of scissors)
- paper material (transformers)
- thick grease samples
- thick petroleum based samples like heavy paints, etc
- and the list goes on
Oil evaporators will generally be used when working with heavy crude oil samples with high turnover testing (keeping the cell clean).
In this video we will discuss and show how the oil evaporator works with a Karl Fischer Titrator.
Talking points include:
- Karl Fischer Titrator
- Oil Evaporator
- Base Oil
- Bubbler Tube
- Nitrogen Gas Source