AquaLab 3 WATER ACTIVITY THEORY
data to construct an isotherm and infer the water content using the
measured water activity of samples and that isotherm. Decagon has
an upgrade available to Series 4TE users that would allow you to
determine moisture content and water activity simultaneously. This
instrument is called the Series 4TE DUO.
We cannot overemphasize the importance of the concept of water
activity for foods, pharmaceuticals, and cosmetics. 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 water content has been
shown.
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