Electrochemical Determination of Cd²⁺ at a Titanium Electrode
Modified with a Lead Film by Square Wave Anodic
Stripping Voltammetry¹

Fatiha Smaili^z and Abdelkader Benchettara

Laboratory of Electrochemistry-Corrosion, Metallurgy and Inorganic Chemistry, Faculty of Chemistry,
(USTHB) BP 32, El Alia Bab Ezzouar, Algiers 16111, Algeria

Received December 2, 2014

Abstract—The modified titanium electrode with lead film (PbTiE) was used for determination of trace levels
of cadmium using square wave anodic stripping voltammetry (SWASV). The measurement of cadmium on the
PbTiE has the best reply under the following conditions of PbTiE preparation: 10^–3 mol L^–1 Pb²⁺ in HCl (pH
1.0), deposition potential of –1.40 V vs. Ag/AgCl/KCl_sat and deposition time of 300 s. The PbTiE reveals
highly linear behavior in the concentration range 5 10^–8 to 10^–6 mol L^–1, with a limit of detection of 2
10^–9 mol L^–1. Interference of nine ionic species was evaluated. The measurements were carried out without
removing dissolved oxygen from the solution.

Keywords: square wave anodic stripping voltammetry, chronoamperometry, lead film, titanium electrode, cad-
mium

DOI: 10.1134/S1023193516010109

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