Abstract
An apparatus for the measurement of the evaporation rate of water across an air/solution interface was devised by remodeling an apparatus for thermal gravimetric analysis. This is a direct measurement method not using a desiccant above the aqueous solution. The evaporation rate of water from the interface was quite sensitive to a flow rate of dry air around the sample pan with 150 mL of water or solution in it. The effect of modification of the interface by amphiphiles on the evaporation rate was examined using two kinds of modifiers, an adsorbed membrane and an insoluble membrane of amphiphiles. The former had no effect on the evaporation rate, while the latter has a retardation effect.
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