Determination of surface and interfacial tension

摘要

The determination of the surface tension of a liquid or of the interfacial tension between two immiscible liquids is effected by drainage methods in which the movement of an air bubble or a droplet of the lighter liquid is observed, certain measurements made and the surface tension or interfacial tension determined from such measurments. The apparatus used, comprising a tapered tube, a rotating uniform diameter tube or a tilted uniform diameter tube, is simple and inexpensive and accurate measurements are obtained.