Static measurement of liquid surface tension involves regulating internal pressure of gas bubble on capillary, deriving surface tension from bubble size/radius, reference/internal pressures

摘要

The method involves regulating the internal pressure p of a gas bubble formed on a capillary in the measurement liquid to an approximately constant value over a time period of optional length. and deriving the surface tension sigma from the bubble size/radius r and a reference pressure pr from the relationship sigma = (p-pr)r/2. An Independent claim is also included for an arrangement for measuring liquid surface tension.