Electrochemical evaluation of fenitrothion organophosphate pesticide in food samples: Novel tetra trifluoromethyl carboxamide zinc (II) macrocyclic complex composite with multiwalled carbon nanotubes

Nagaraja, O and Nagarajappa, H and T M, S and Pandith, A and Al-Qahtani, WH and Nagaraja, BM (2024) Electrochemical evaluation of fenitrothion organophosphate pesticide in food samples: Novel tetra trifluoromethyl carboxamide zinc (II) macrocyclic complex composite with multiwalled carbon nanotubes. In: Composites Part B: Engineering, 287 .

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Abstract

This study presents the development of a groundbreaking electrochemical sensor for detecting fenitrothion (FNT) using a multi-walled carbon nanotubes (MWCNTs) and a newly synthesized zinc (II) tetra trifluoromethyl carboxamide phthalocyanine (ZnTFMPCAPc). The ZnTFMPCAPc was synthesized concluding a two-step mechanical and magnetic stirring method, and the ensuing ZnTFMPCAPc@MWCNTs underwent comprehensive characterization employing X-ray diffraction (XRD), Ultraviolet visible spectroscopy (UV�Vis), mass spectrum, Fourier transform infrared spectroscopy (FT-IR), Thermo-gravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), Mass, Raman spectra, Transmission Electron Microscopy (TEM) and scanning electron microscope (SEM). Cyclic voltammetry (CV) analysis demonstrated a remarkable seven-fold improvement in electrochemical signals with ZnTFMPCAPc@MWCNTs on modified glassy carbon electrode (GCE) compared to a bare and modified GCE. The correlation between peak current and FNT concentration (in the range of 10�310 μmol) was established. The estimated limits of detection (LOD) and quantification (LOQ) were determined to be 1.358 nmol and 4.075 nmol respectively. The ZnTFMPCAPc@MWCNTs/GCE sensor was successfully evaluated by quantifying FNT in tomatoes, grapes, paddy grains, and potato extracts, resulting in satisfactory results. Detecting fenitrothion is crucial due to its widespread use as a pesticide, which can result in environmental contamination and pose health risks. Regular monitoring is essential for protecting food and water supplies, preserving ecosystems, and ensuring compliance with regulations to prevent long-term environmental damage. © 2024 Elsevier Ltd

Item Type:	Journal Article
Publication:	Composites Part B: Engineering
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to the publisher.
Keywords:	Atomic emission spectroscopy; Bioremediation; Cyclic voltammetry; Electrochemical sensors; Glass membrane electrodes; Glassy carbon; High resolution transmission electron microscopy; Insecticides; Multiwalled carbon nanotubes (MWCN); Nuclear magnetic resonance spectroscopy; Thermogravimetric analysis, Carboxamides; Fenitrothion; Glassy carbon electrodes; Modified glassy carbon electrode; Multi-walled-carbon-nanotubes; Organophosphate pesticides; Paddy grains; Surface-modification; Synthesised; Trifluoromethyl, Fourier transform infrared spectroscopy
Department/Centre:	Division of Interdisciplinary Sciences > Interdisciplinary Centre for Water Research
Date Deposited:	23 Sep 2024 09:39
Last Modified:	23 Sep 2024 09:39
URI:	http://eprints.iisc.ac.in/id/eprint/86244

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