Performance improvement and new applications of “Salt matrix voltammetry”

Salt matrix voltammetry (SMV) experiments performed with K4Fe(CN)6 and FeCl2 in NH4Cl or NaCl matrices showed that the replacement of the calomel reference electrode used in the Dale et al.'s [1] original device with a silver rod significantly improved the voltammograms quality. Moreover, we demonstrated that this technique is suitable for investigating insoluble species as metallic copper and pyrite. Experiments in progress indicated that the SMV principle can be applied directly to clays.

► Significant improvement of “Salt matrix voltammetry”: no ohmic drop, higher Faradaic currents. ► Extension of the “Salt matrix voltammetry” concept to insoluble electroactive species. ► Voltammetric characterization of copper and pyrite microparticles in ammonium chloride matrix. ► Almost in-situ technique for the voltammetric characterization of clays.