Abstract

Microemulsions are thermodynamically stable systems in which one phase (e.g. oil) is dispersed into another phase (e.g. water). The globule size of the dispersed phase is normally less than 1 micron. Microemulsion systems are normally transparent when a short chain alcohol is added. Microemulsions have practical value in food industry, cosmetic industry, drug-delivery systems, and enhanced oil recovery. One of the most sought out physical characteristic of a microemulsion system is the globule size in case of a monodisperse system and the globule size distribution in case of a polydisperse system. The conventional techniques of sedimentation, centrifugation, and electrochemical are limited in scope, because they require elaborate calibration procedures and are invasive in nature. The conventional light scattering has the capability of making non-invasive measurements on dilute microemulsion systems, but as discussed later the conventional light scattering instrumentation is practically difficult to use in field operations.

© 1992 Optical Society of America