Chemical Science International Journal

Detection of Lead (II) on a Boron-doped Diamond Electrode by Differential Pulse Anodic Stripping Voltammetry

Koffi Konan Sylvestre

Laboratoire de constitution et réaction de la matière, UFR SSMT, Université Félix Houphouët-Boigny de Cocody, Abidjan, 22 BP 582 Abidjan 22, Côte d’Ivoire.

Kambiré Ollo

UFR Sciences et Technologies, Université de Man, BP 20 Man, Côte d’Ivoire.

Kouadio Kouakou Etienne

Laboratoire de constitution et réaction de la matière, UFR SSMT, Université Félix Houphouët-Boigny de Cocody, Abidjan, 22 BP 582 Abidjan 22, Côte d’Ivoire.

Kimou Kouakou Jocelin

Laboratoire de constitution et réaction de la matière, UFR SSMT, Université Félix Houphouët-Boigny de Cocody, Abidjan, 22 BP 582 Abidjan 22, Côte d’Ivoire.

Ouattara Lassiné *

Laboratoire de constitution et réaction de la matière, UFR SSMT, Université Félix Houphouët-Boigny de Cocody, Abidjan, 22 BP 582 Abidjan 22, Côte d’Ivoire.

*Author to whom correspondence should be addressed.

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Abstract

Lead, even in low concentrations, can be dangerous and toxic to humans and their environment. Due to the toxicity of this metal, an electroanalytical method has been developed for the direct quantitative determination of Pb²⁺. The Pb²⁺ detection was performed using Differential Pulse Anodic Stripping Voltammetry. The quantification of Pb²⁺ by these electrochemical methods was carried out on a boron-doped diamondmicro electrode in HNO₃ medium (0.01 M). This work made it possible to efficiently detect lead with a detection limit equal to 0.052 μM and a quantification limit equal to 0.173 μM. This method made it possible to selectively detect and quantify the Pb²⁺ in the presence of other metals such as Cd²⁺ and Cu²⁺. In the presence of other metals, a recovery rate of 94.53% was observed. This value is close to the recovery rate obtained (98.6%) when the Pb²⁺ is alone in electrolyte.

Keywords: Boron-doped diamond, lead, detection, Voltammetry

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