Characterization of MicroEmulsion
By: Pharma Tips |
Views: 5512 |
Date: 02-Jun-2011
Characterization of microemulsions is a difficult task because of the variety ofstructures and components involved, and the limitations with the available techniques.
Characterization of microemulsions is a difficult task because of the variety of
structures and components involved, and the limitations with the available techniques.
Therefore, it is preferable to employ a combination of techniques as far as
possible.
Particle size in microemulsions can be elucidated by small-angle X-ray
scattering, small-angle neutron scattering, dynamic and static light scattering,
freeze fracture electron microscopy, and neutron scattering techniques. NMR has
been used to measure self-diffusion coefficients of the various components.
Viscosity measurements can be used to determine the interaction of dispersed droplets
and can indicate the pressure of rod-like or worm-like reverse micelles (Yu and
Neuman 1995; Angelico et al. 1998).
Conductivity experiments can be used to determine the type of microemulsion
and to study phase inversion phenomena
(Lawrence and Rees 2000).
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