Surface active agents - Determination of interfacial tension of solutions of surface active agents by the stirrup or ring method; German version EN 14210:2003
This document specifies test methods for the determination of interfacial tension in the range from 4 mN/m to 50 mN/m between two immiscible liquids which can also be free from surface active agents. It is particularly suitable for determining the interfacial tension between water or aqueous solutions and organic liquids which are immiscible with water.