A Novel Electrochemical Sensor for Detection of Molinate Using ZnO Nanoparticles Loaded Carbon Electrode

Abstract

In this work, electrochemical detection of molinate herbicide was studied by developing a novel sensor based on carbon paste incorporated with zinc oxide (ZnO) nanoparticles using cyclic (CV) and square wave voltammetric (SWV) techniques. Molinate exhibited one well resolved peak at pH of 3.0 phosphate buffer solution (PBS), which was irreversible. The lowest possible detection limit of 1.0×10−8 M was achieved in the concentration range of 0.002 μM to 0.25 μM. The modifying ability of ZnO nanoparticles was responsible for such a low level sensing in water and soil samples.

Cobalt metal–organic framework-based ZIF-67 for the trace determination of herbicide molinate by ion mobility spectrometry: investigation of different morphologies

“…1,2 Molinate is a thiocarbamate herbicide extensively applied worldwide to protect weeds in rice crops. 3,4 This herbicide is stable at atmospheric pressure as well as environmental temperature and is a liquid with a pungent odor, and is colorless and transparent. The heat decomposition of this compound produces toxic fumes that contain sulphur, oxygen, and nitrogen.…”

The Mn‐zeolite/Graphite Modified Glassy Carbon Electrode: Fabrication, Characterization and Analytical Applications

“…Based on the transduction mechanism used, optical, electrochemical and piezoelectric sensors can be distinguished. To improve their performance, modifying layers made from polysaccharide , conducting polymers , carbon nanomaterials , ZnO and TiO 2 nanoparticles , biological receptors , nanosilica and zeolites are introduced.…”

A Facile, Sensitive and Rapid Sensing Platform Based on CoZnO for Detection of Fipronil; an Environmental Toxin

“…Electrochemical techniques are used among different types of biosensors and have proven to have intrinsic advantages [20][21][22]. Electrochemical biosensors are being used widely for drug [23,24], phytochemical compound [25][26][27][28][29] and disease markers [30][31][32][33] due to their sensitivity, reproducibility, and ease of miniaturization [34][35][36]. Also, in contrast with many other methods, it is ideal for the detection of small molecules, due to its simplicity and low cost [29].…”

“…Another prominent application of ZnO is in the field of sensing and imaging used to monitoring and track patient's health and be a suitable bio-imaging tool [22]. ZnO nanostructures have been extensively reported in bio-sensing [22,25,42]. The addition of impurities into ZnO induces great changes in their properties.…”