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Characterization of MicroEmulsion

By: Pharma Tips | Views: 3374 | 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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