The desorption rates of dodecyl sulfate ions from nylon particles in aqueous solutions were determined using newly developed apparatus in the electric conductivity stopped-flow method. The temperature dependence of the desorption rate in the early stage of process was investigated and the activation energy of desorption was calculated from Arrhenius plots of the experimental results as 65.5kJ/mol. This value was almost equal to the enthalpy of adsorption that was pre-viously estimated in the same system. It shows that there is no activation energy of adsorption in the early stage of the process.
