The concetration association degree in cationic surfactant micellar solution was determined by ISE method and conductance method. The results showed that ISE method was reliable.

The complexes formed in organic solvent, aqueous and micellar solution are injected into chromatographic system or the metal ions are injected into the eluent containing the chelating agent.

The petroleum solution is a colloidal dispersion in which the asphaltene comprises the micellar nucleus, the resin forms the solvation layer and the remaining gas oil ACTS as the dispersing medium.