 |
|
Navigation: Water activity |
|
| • | What is water activity |
| Test Introduction | |
| Test details | |
| Salt solutions used | |
| Calibration samples used | |
| Desktop instruments | |
| Portable instruments | |
| Results | |
| Desktop instruments | |
| Decagon AquaLab 3TE | |
| Novasina LabMASTER-aw | |
| Rotronic HygroLab 2 | |
| Portable instruments | |
| Decagon PawKit | |
| Rotronic HygroPalm | |
| Testo 650 | |
| Summary | |
| Desktop instruments | |
| Portable instruments | |
|
|
Water
activity
EminTech
The property varies between 1 and 0 (zero).
Water activity 1 denotes that water is accessible as in pure water,
water activity 0 denotes that water is not accessible at all.
behaviour than water concentration. Examples include hydrolysis,
solubility, diffusion, protein activity, living tissue properties
and many other applications.
corresponding to high concentrations of common salt (NaCl).
Salt is therefore used for preservation, and water activity,
but not concentration, is the important parameter.
important parameter, because concentration generally shows
some type of proportionality to activity.
The real parameter for analysis is, however, quite often water activity.
As this insight is learned, laboratories begin to use water activity
as parameter, increasing the precision of their analytic efforts.
of volatile solvents, unsuitable with the AquaLab instrument.
measurement instruments