Mass of transfer are measured in succession using liquid scitillation counting technique.Transfer of Ap and Sp series of labelled nonionic surfactants from water phase into oil phase have been studied in the presence of salts.Compared to mass of transfer in the absence of salt

mass of transfer of Ap and Sp series of surfactants is increasing with the increasing of salt concentration in the presence of NaCl、KCl、Na 2SO 4 and Na 2CO 3. In the presence of CaCl 2 and MgCl 2

mass of transfer of Ap251 and Ap281 is decreased with the increasing of salt concentration in the lower salt concentration region

while mass of transfer of Ap251 and Ap281 is increasing as salt concentration is increasing in the higher salt concentration.In the presence of CaCl 2 and MgCl 2

mass of transfer of Sp161 and Sp165 is increasing with the increasing of salt concentration in the lower salt concentration region

while mass of transfer of Sp161 and Sp165 is decreased as salt concentration is increasing in the higher salt concentratin.In this paper

the effects of salts on transfer have been discussed.