Procedure and equipment for the level-independent measurement of the surface-tension of liquid substances

摘要

To measure the surface tension of a liquid substance, a gas flow is introduced into the liquid and, during bubbling, the timings are taken from the time of gas feed for the first sign of the bubble pressure and/or the gas vol. flow time. The surface tension is taken from the max. value of the vol. flow and/or the min. value of the first effect of the pressure of this flow after the injection time. Or the surface tension is taken from the max. value of the reading of the first pressure effect after the injection time or from the difference between the max. and min. values of the vol. flow time and/or the first pressure effect after this time. Also claimed is an appts. with a measurement cell (1), with a measurement jet (2), directly in the liquid being measured or in a bypass. The measurement cell (1) is linked to a container (11) through a pump (10).