The isobaric vapor-liquid equilibrium data of systems of ethyl acetate((1))-n-octane((2)) and isopropyl acetate((1))-n-octane((2)) were determined at 0.0709 MPa and 0.1013 MPa by using a modified Rose-Williams still. The experimental data were tested for thermodynamical consistency and correlated satisfactorily with p-T equation of state and Wilson equation.