Ultrasonic imaging of gravitational separation in emulsions

An ultrasonic imaging technique was developed to monitor gravitational separation in emulsions. A series of 20 wt.% corn oil-in-water emulsions (d32 = 1.32 μm), stabilized by a non-ionic surfactant, were prepared with different concentrations of xanthan in the aqueous phase (0–0.08 wt.%). Gravitational separation in these emulsions was then measured at 0 and 24 h using ultrasonic imaging. Data is presented in the form of two-dimensional images...