The location of ligand units of ligand-modified carbon paste surfaces is revealed by complexation with I iron(II), followed by a chemical deposition of gold(0) or AuCl4- onto the immobilized iron centers. in addition, the mapping on carbon paste surfaces of ligand centers bearing intrinsic or induced positive charges can be done via direct ion-pair formation with AuCl4-. Gold(0) and gold(III) deposits on the surface mark the locations of the immobilized iron centers on the carbon paste surfaces, and both forms of gold are easily recognized and mapped by scanning electron microscopy utilizing backscattered electron imaging. This approach is illustrated with examples of 4,7-diphenyl-1,10-phenanthroline-modified carbon pastes. Cyclic voltammetry, as well as energy-dispersive X-ray microanalysis, confirms the validity of the approach.