The invention provides a method of performing one- and two-dimensional electrophoresis with or without gel in an automated way. A plurality of image windows, which can be switched between an active state and an inactive state, are arranged on a diagnosis screen, and images for observation generated from volume data obtained on specified imaging dates are displayed in each image window. In a preferred two component base composition, the base composition consists of: a surfactant, containing polyethylene glycol; and liquid propofol.