A liquid dispersion (suspension, emulsion) is “stable” over a defined period of time if the dispersed particles remain unchanged (within predefined criteria). In principle, destabilization phenomena can be divided into two categories:
- Particle growth: effects such as agglomeration, coalescence, Ostwald ripening
- Particle migration: creaming, sedimentation, phase separation, etc.
Static multiple light scattering (SMLS technique) is particularly suitable for the qualitative (type of effect) and quantitative (kinetics) investigation of these effects.
Static multiple light scattering
In static multiple light scattering, as implemented in the BeScan Lab, the sample in a glass measuring cell is examined for stability using vertical, spatially and time-resolved scans. As the emitted light signal is detected in both transmission and backscattering, the measuring device is suitable for stability testing of diluted, translucent as well as concentrated, opaque dispersions.
BeScan Lab:
Stability analysis of Dispersions
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