Measurement of surface and interfacial tension from the maximum pressure in sessile and pendant bubbles and drops

The measurement of surface and interfacial tension from the maximum pressure in sessile and pendant bubble and drops is, described. New theoretical data are presented which enable the surface and interfacial tension to be calculated without iteration. Although the maximum pressure in pendant bubbles is less than that in sessile bubbles, they retain their symmetry during detachment from the capillary tip and so havt experimental advantages. Reproducible results in good agreement with literature values are obtained for the surface and interfacial tension of several liquids and immiscible liquid pairs.