ch. 1. Introduction to thermodynamic consideration of fluid/fluid interface -- ch. 2. Basic thermodynamic relations for the analysis of fluid/fluid interface -- ch. 3. Surface tension of pure water at air/water and oil/water interfaces -- ch. 4. Surface tension of solutions -- ch. 5. Surface tension of simple salt solutions -- ch. 6. Adsorption of ions at air/water interface -- ch. 7. Surface tension of solutions and temperature -- ch. 8. Adsorption from mixed electrolyte solutions -- ch. 9. Aqueous solutions of Zwitterionic amino acids.