Ion transfer voltammetry of tryptamine, serotonin, and tryptophan at the nitrobenzene/water interface

The transfer of the cationic forms of tryptamine and serotonin across the nitrobenzene (NB)/water (W) interface was studied by cyclic voltammetry. Well-defined voltammetric waves were observed within the potential window. The standard potentials of the transfer were determined from the midpoint potentials of the voltammograms. The transfer of the cationic form of tryptophan across the NB/W interface was also observed using an acidic aqueous solution.

► The transfer of cationic forms of tryptamine, serotonin, and tryptophan. ► That happened at a liquid–liquid interface by cyclic voltammetry. ► It is successfully determined the hydrophobicity parameters of these ions. ► This is the first report of the ion transfer voltammetry of them.