A differential refractometric method is used to study the temperature and composition dependence of preferential adsorption of water on the surface of pore-controlled glass out of 2-butoxyethanol (abbreviated C(4)E(1))/water mixtures. The experiments are carried out close to the liquid/liquid coexistence curve in the vicinity of the lower critical point of the system. When the temperature of phase separation T-p of the mixture is approached at (almost) constant bulk composition from temperatures below T-p the amount of substance of adsorbed water (n) over tilde(w)(s) per unit mass of adsorbent extrapolated to T-p increases along the liquid/liquid coexistence curve with increasing values of x degrees (x degrees, mole fraction of C(4)E(1) of the mixtures before adding the absorbent). In experiments with mixtures of composition x degrees>x(c), the quantity (n) over tilde(w)(s) is about 10 times larger than that found in experiments with mixtures of compositions x degrees

Keywords:LOWER CRITICAL-POINT;2-BUTOXYETHANOL WATER MIXTURES;TEMPERATURE-DEPENDENCE;INTERFACIAL-TENSION;WETTING PHENOMENA;VICINITY;COLLOIDS;SURFACE;SYSTEM;DIFFUSIVITY