Abstract We have studied two surfactants: Sodium dodecyl sulfate and Dodecyltrimethyl ammonium bromide and five electrolytes: NaCl、KCl、CaCl2、NaNO3 and Na2SO4. Vitamin E dissolution in surfactant solutions can be largely increased by adding electrolyte(saturation value>1). Stability of emulsion is also improved. In this study, we used dynamic light scattering、UV absorption、turbidity and visual observation to study the influence of an electrolyte on emulsion systems. The CMC and MDC of many surfactant solutions shift to the lower concentration by adding electrolytes and the solubilization curves moves to lower surfactant concentrations which is more suitable for some applications.
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