Sensitive Carbon Fiber Microelectrode for the Quantification of Diuron in Quality Control of a Commercialized Formulation

Serge Mbokou Foukmeniok; Roland Fabrice Yibor Bako; Ousmane Ilboudo; Yssouf Karanga; Evangéline Njanja; Maxime Pontie; Issa Tapsoba; Ignas Tonle Kenfack; Rousseau Djouaka

doi:10.1155/2022/9994639

Sensitive Carbon Fiber Microelectrode for the Quantification of Diuron in Quality Control of a Commercialized Formulation

Int J Anal Chem. 2022 Mar 11:2022:9994639. doi: 10.1155/2022/9994639. eCollection 2022.

Authors

Serge Mbokou Foukmeniok^{1

2

3

4}, Roland Fabrice Yibor Bako^{2

5}, Ousmane Ilboudo², Yssouf Karanga⁶, Evangéline Njanja¹, Maxime Pontie³, Issa Tapsoba^{2

5}, Ignas Tonle Kenfack¹, Rousseau Djouaka⁴

Affiliations

¹ Electrochemistry and Chemistry of Materials, Department of Chemistry, University of Dschang, P.O. Box 67 Dschang, Cameroon.
² Laboratoire de Chimie Analytique Environnementale et Bio-Organique (LCAEBiO), Département de Chimie, Université Joseph KI-ZERBO, 03 BP 7021 Ouagadougou 03, Ouagadougou, Burkina Faso.
³ Angers University, Group Analysis and Processes (GA&P), Chemistry Department, Faculty of Sciences, 2 Bd A. de Lavoisier, 49045 Angers Cedex 01, France.
⁴ International Institute of Tropical Agriculture, Cotonou 08 BP 0932, Benin.
⁵ Ecole Normale Supérieure (ENS), 01 BP 1757 Annexe Ouagadougou, Secteur 29, Burkina Faso.
⁶ Laboratoire de Chimie des Matériaux et de l'Environnement (LCME), Université Norbert ZONGO, Avce Maurice Yameogo, Koudougou BP 376, Burkina Faso.

Abstract

Nickel(II) tetrasulfonated phthalocyanine (p-NiTSPc)-modified carbon fiber microelectrode (CFME) was used for the first time to investigate the electrochemical quantification of diuron in an agrochemical formulation. The surface morphology and elementary analysis of unmodified carbon fiber microelectrode (CFME) and p-NiTSPc-CFME were performed using atomic force microscopy (AFM) and energy dispersive X-ray spectroscopy (EDX), respectively. Cyclic voltammetry (CV) was used to investigate the electrochemical behaviour of diuron, while square wave voltammetry (SWV) was used for quantitative analysis of diuron. Upon variation of some key analytical parameters, a calibration curve was plotted in the concentration range from 21.450 to 150.150 μM, leading to a detection limit (DL) of 8.030 μM mg/L (3.3σ/m) and a limit of quantification (LQ) of 20.647 μM mg/L. The fabricated p-NiTSPc-CFME was successfully applied for quality control in a commercialized formulation of diuron. The standard additional method was used, and the recovery rate of diuron was found to be 98.4%.