A syringe for surface tension measurements at constant temperature

Abstract

The drop volume method can give precise results for the surface tension of liquids if a certain number of precautions are taken. One of the most important is the temperature control. A drop volume syringe fitted with a jacket is described; water at constant temperature circulates in the jacket. The syringe is introduced in a brass chamber and the whole system immersed in a thermostat. The closed chamber eliminates evaporation and allows the surface tension to be determined in an inert atmosphere.