Abstract: There is provided a process for the production of at least 95% pure immunoglobulin from plasma; the process comprising applying the plasma to a first fluid stream of an electroseparation system, the electroseparation system comprising a separation membrane disposed between a cathode and an anode, the separation membrane having defined pore sizes; a first restriction membrane disposed between the cathode and the separation membrane and defining a first fluid path for a first fluid stream wherein the first restriction membrane prevents molecules in the first fluid stream contacting the cathode; a second restriction membrane disposed between the anode and the separation membrane and defining a second fluid path for a second fluid stream wherein the second restriction membrane prevents molecules in the second fluid stream contacting the anode; and applying an electric field to the fluid streams to selectively cause positively charged immunoglobulin molecules to cross the separation membrane toward the cathode and