After the preparation, fresh emulsions were placed in glass cells and stored at room temperature (25 ± 1◦C) for 90 days. The emulsion structure and stability was determined during the storage by the multiple light scattering (MLS) method, using a Turbiscane LAb Expert analyzer. A freshly prepared emulsion (ca. 25 mL) was placed into a flat-bottomed cylindrical glass cell. The sample was scanned by using two synchronous optical sensors that detected the intensity of light transmitted through and backscattered by the vertical sample (180◦and 45◦from the incident laser light, respectively). The reading head acquired backscattering (BS) and transmission data every 40 m while moving along the entire height of the cell (i.e., 55 mm). For a given dispersion, changes of concentration (migration of particles) can be detected. In the case of particle migration, the increase in BS levels can be observed at the bottom or top of sample (i.e., sedimentationor creaming), since the concentration of particles has increased in those regions. It is obvious that creaming (or sedimentation) influences the simultaneous decrease of particle concentration at the bottom (or in the uppermost region) of a vertical sample, and this is recorded by the analyzer as a progressive decrease of BS intensity for that region. A decrease in the total BS intensity usually indicate changes in particle size (originated from flocculation, agglomeration or coalescence) [11,12]. As long as BS readings are constant for the entire height of a dispersion vertical sample, mean BS values are acceptable for computation for particular scans recorded at different time points. In our investigations, the monitoring of emulsion stability was performed as a function of time. The parameters BS5–45(i.e. the mean BS recorded in the region from 5 to 45 mm of the sample height) was employed to characterize the changes in emulsion structure. Each sample was analyzed three times, and the data are presented as an average.