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Sample distribution:
Solids
Distribute powdery and grainy samples evenly on the sample
plate.
Crush samples with coarse grains (ground, crush)
Liquids
Thinly spread viscous and sticky samples. It is recommended to
uses glass fiber filters.
Weight loss due to splashing can be avoided by covering the
sample with a glass fiber filter. If glass fiber filters are used their
weight must be tared out.
13.4 Drying temperature
The following influencing factors must be considered when setting the drying
temperature:
Surface of the sample:
Liquid and spreadable samples have, unlike powdery and grainy samples, a smaller
surface to conduct thermal energy.
Using a glass fiber filter improves the absorption of heat.
Color of the sample:
Light colored samples reflect more thermal radiation than dark colored ones;
therefore they require a higher drying temperature.
Availability of volatile substances:
The better and faster water or other volatile substances are available the lower you
can set the drying temperature. If water is not easily available (e.g. in plastics), water
must be forced out at a high temperature (the higher the temperature, the higher the
steam pressure).
The same results as with other moisture analyzing methods (e.g. drying cabinet) can
be reached by optimizing setting parameters, such as temperature, heating level and
turn-off criteria experimentally.
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