The goal of this work consists of studying stability of polydispersed double emulsions. In the experiments performed, the reverse emulsion corpuscles were diluted in the aqueous phase ( ≤ 30%v.). The kinetic evolution of Span 80 / SDS (lipophilic surfactant / hydrophilic surfactant) - type double emulsions was traced by using a NaCl solution as internal aqueous phase and a glucose solution, isotonic to the saline one, as external aqueous phase, while the oily phase was toluene. The kinetic evolution of the double emulsions was traced by conductance measurement of the external aqueous phase. It has been ascertained by conductometric method that speeds of the passing at NaCl towards outside increases with added SDS quantity The release experimental values fit well the first order kinetic equation in for SDS concentration bigger than 1 CCM and the naught order for SDS concentration smaller than 1 CCM.