Fluorographic detection of tritium-labelled proteins in immunoelectropherograms with the water-soluble fluor, sodium salicylate.

A method is described for detecting by fluorography tritium-labelled proteins in immunoelectropherograms performed on agarose gels. The technique is based on the impregnation of immunoplates with sodium salicylate immediately after electrophoresis without the formation of a mixed agarose--polyacrylamide gel prior to processing the immunoelectropherograms for fluorography. Sodium salicylate, an inexpensive and water-soluble compound, has been found to serve as a satisfactory fluor for enhanced detection of radioactivity in agarose gels.