This European Standard specifies a method for measuringThe foaming power of a surface active agent andThe antifoaming power of a defoamer with regard to a foaming solution.The method is applicable to all surface active agents and particularly to tow foaming products and antifoaming surface active agents.However, measurement of the foaming power of solutions of readily hydrolyzable agents does not give valid results, asThe hydrolysis products gather inThe films of liquid and affectThe persistence of the foam.
EN 13996:2002 history
2002EN 13996:2002 Surface active agents - Foaming power and antifoaming power - Turbine stirring method