Potentiometric Determination of Palladium(II) in Aqueous Solutions Using a Modified Carbon-Paste Electrode

We studied the main electrode functions of carbon paste electrodes (CPEs) modified with 0–20% of dithiooxamidated polysiloxane with respect to palladium(II). The conditions for the potentiometric titration of palladium(II) using modified CPEs as indicator electrodes were selected, namely, pH 1–2, solutions of EDTA and potassium iodide as the titrants; and modifier concentration is 0, 5, and 10%. A procedure was developed for determining palladium(II) in aqueous solutions. The procedure was tested using a GSO solution of palladium(II) and an industrially produced activator Pd-600.