A Highly Sensitive Electrochemical Sensor Based on Electrocatalytic Reduction Effect of Cu2+ on Trace Determination of Malathion in Soil and Other Complex Matrices. (24th December 2021)

• Record Type: Journal Article
• Authors: Alshareef, F. M.; Orif, M. I.; Al-Harbi, E. A.; El-Shahawi, M. S.
• Other Names: Hu Shengshui Academic Editor.
• Is Part Of: International journal of electrochemistry. Volume 2021(2021)
• Publication Date: 2021-12-24
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; 660.297
• DOI: 10.1155/2021/8110364
• Languages: English
• ISSNs: 2090-3529

Abstract

Abstract : The current strategy reports a highly sensitive and selective square wave-cathodic stripping voltammetric protocol for malathion determination. The established method was based on the controlled adsorptive accumulation of malathion in the presence of Cu 2+ ions in an aqueous solution of pH 2 onto the hanging mercury dropping electrode (HMDE) and measuring the resulting cathodic peak current of the adsorbed species at −0.42 V versus Ag/AgCl electrode. The low limits of detection (LOD) and quantification (LOQ) of malathion of the assay were estimated to be 3.1 × 10 −10 and 1.03 × 10 −9 M with a linear dynamic range of 1.03×10 −9 – 2.0 × 10 −7 M, respectively. The method was satisfactorily applied and validated for malathion determination in environmental samples. The experimental Student t exp and F exp values did not exceed the tabulated t tab (2.78) and F tab (6.39) at 95% ( P = 0.05) confidence ( n = 5), confirming the precision and independence on the matrix. The developed sensing platform for the detection of malathion shows superior performance to conventional electrochemical methods. The proposed sensor offered simple, economical, reproducible, and applicable approach for the determination of malathion in environmental samples.