Antioxidant Activity of Asphaltene and Resinous Components in a Magnetic Field

The antioxidant activity of resin–asphaltene components isolated from two crude oils of different compositions was analyzed before and after exposure to a magnetic field using the voltammetric method of oxygen electroreduction. The antioxidant activity of the test asphaltenes and weakly polar and polar resins increased or decreased with increasing sample concentration in a supporting electrolyte solution. Petroleum antioxidants are part of a complex colloidal structural system, and they are associated with it by associative interactions that arise as a result of changes in the size and activity of associates in the petroleum system as a whole.