Karl Fischer oven Mitsubishi Chemical Analytech
ISO 760, ASTM E203/E1064

model VA-200: Vaporizer for solid sample
Plastics, rubber, foods, pharmaceuticals, inorganic slats and other powders and solid samples.
The moisture vaporization method is used to measure samples of solids that cannot be dissolved in dehydrated solvents or electrolytes, or samples that include interfering substances. The moisture content is vaporized by heating the sample in a flow of dried nitrogen gas. It is then captured in a dehydrated solvent or electrolyte and subjected to Karl Fischer titration.
Either coulometric or volumetric titration is used.
This method is commonly used with natural substances, such as minerals and rocks, and with macromolecules such as polymers and rubber. New areas of use include electronic materials, including printed circuit boards and wafers, and printing materials, such as toners. This method is also useful for petroleum products containing additives, such as lubricants.
Convenient moisture vaporization systems are available commercially to suit various purposes. They can be connected to either volumetric or coulometric titration systems and used to measure moisture content.

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