ASTM D1331-14

Standard Test Methods for Surface and Interfacial Tension of Solutions of Paints, Solvents, Solutions of Surface-Active Agents, and Related Materials

This standard describes test methods to determine the surface tension and interfacial tension of surface-active agents with a tensiometer. 
 

• Method A—Surface Tension by du Noüy ring
• Method B—Interfacial Tension by du Noüy ring
• Method C—Surface Tension by Wilhelmy plate
• Method D—Interfacial Tension by Wilhelmy plate.