H, where GC-FID, elemental analysis, and FTIR analyses also confirmed a more aliphatic character for the IMR fractions obtained by centrifugation. Model emulsion tests further showed that the IM fractions obtained by centrifugation/Dean-Stark conferred greater stability to the W/O system than those isolated using wet silica, indicating that emulsion stabilization depends on the combined action of polar and nonpolar species.
Costa et al. (Mon,) studied this question.