The effectiveness is the difference between the surface tension
of pure water (go) and the surface tension of surfactant solution
(g) at the critical micelle concentration. Which give us good idea
about the properties of prepared surfactants and their efficiency
as a good surfactant. The most effective prepared surfactant is one
which gives the largest reduction of the surface tension at the
CMC. By inspection data in Table 1, it was found that the
compound C12BT at 25 8C more effective surfactant, which
achieves the maximum reduction of the surface, tension at
CMC reach to 41.79 [17].