Decagon Devices pawkit Operator's Manual page 17

Pawkit User Manual
3. Water Activity Theory
and moisture content of potato flakes dried to varying
degrees using the standard drying process for those flakes.
An isotherm would be constructed using those data, and the
moisture content would be inferred using the measured
water activity of samples and that isotherm.
The importance of the concept of water activity of foods,
pharmaceuticals, and cosmetics cannot be overly emphasized.
Water activity is a measure of the energy status of the water in
a system. More importantly, the usefulness of water activity in
relation to microbial growth, chemical reactivity, and stability
over moisture content has been shown.
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