A comparison of measurement techniques used in the analysis of evolving liquid-liquid dispersions

In the case of the PVM system used here the relatively long image acquisition times preclude the use of the technique in following the rapid changes at the early stages in the evolution of a dispersion. The direct sampling method provided consistent reproducible results for the particular liquid-liquid combination used here; however, for larger density differences between the two phases care must be exercised to ensure that the extracted samples are truly representative of the local conditions in the agitated vessel.