3.1. Surface and interfacial tension measurements
Surface tension values of the aqueous phase of an emulsionare indicatory data of the emulsion stability with time. Table 1shows the corresponding values for each emulsion of the study. Analcoholic solution with 12% or 13% (v/v) ethanol has surface ten-sion values _ = 49.5 mN/m and 48.1 mN/m, respectively [10,11].