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Example 3. A stable heating condition cannot be found at any temperature
Samples like this are difficult to measure using heating and drying.
The sample may have a high content of volatile oil (fat) or its surface may carbonize easily due to its dark
color.
However, it is possible to measure and evaluate moisture content of such samples by measuring under the
same conditions (sample quantity, heating temperature, measurement termination condition), with
previously set heating temperatures and measurement termination conditions (measurement terminates
when the moisture loss value per unit of time is below certain conditions).
Furthermore, carbonization of sample surface can be avoided by placing a glass fiber sheet on top of the
sample. This enables heating under high temperature, which may shorten measurement time and improve
measurement accuracy.
Such samples include coffee beans, as shown below, as well as green tea.
■Application/B.Data analysis/2. RsFig
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