Circulation micro-ebulliometer for determination of pressure above mixtures containing solvent and non-volatile component

All-glass micro-ebulliometer with circulation of liquid phase has been constructed for determination of total pressure over solutions of polymers; charge of liquid phase is approximately 8 mL. Vapour pressure of pure toluene was measured to prove its proper functioning, and then pressure versus composition was determined for the polymer + toluene, + hexane, and + chloroform mixtures at different temperatures. Correlations of two data sets with use of the UNIQUAC equation were carried out as illustration of quality data.