Modified carbon paste electrode for the electrochemical sensing of 3,5,6-trichloro-2-pyridinol

Abstract

An electrochemical sensor for the determination of 3,5,6-trichloro-2-pyridinol (TCP), the main metabolite of the pesticide chlorpyrifos, was herein developed. TCP has greater solubility than the source pesticide, and its occurrence in ground and surface water is more frequent and more dangerous. The sensor was fabricated using carbon paste modified with the inorganic complex chloro-5,10,15,20-tetrakis-(pentafluorophenyl)-21 H,23 H-porphyrin iron(III) (FeTPPCl); this metallic complex has a chemical core structure similar to the heme cofactor of the cytochrome P450 (CYPs). Measurements were performed with square-wave voltammetry. Using the optimised voltammetric parameters and without any sample preparation, the sensor showed a limit of detection of 2.8 mg L −1 (14 μmol L −1 ), recoveries ca. 102%, suitable selectivity and long durability (over 1 month).

Development of Organochlorine Pesticide Electrochemical Sensor Based on Fe3O4 Nanoparticles@indium Tin Oxide Electrode

“…So, research was still intensively on the construction of simple, cheap, and selective pesticide sensors. The electrochemical techniques were widely reported for quantitatively sensing the different environmental organic pollutants [21]. They are simple, easy to use, fast, inexpensive, and highly sensitive [22,23].…”

Laser‐pyrolysed paper electrodes for the square‐wave anodic stripping voltammetric detection of lead

“…One of the most challenging aspects concerning metal pollution of water sources is field monitoring of environmental samples (Santos et al, 2017; Li et al, 2015; Moraes, Gonçalves, & Pereira, 2018; Wang et al, 2014). Particular interest is developed regarding the pollution caused by lead (Pb), taking into account public concern and medical data about related risks to human health and environment (Wani, Ara, & Usmani, 2015).…”

Synthesis and characterization of magnetic-molecularly imprinted polymers for the HPLC-UV analysis of ametryn

“…In general, legislation considers levels above 0.5 μg L − 1 in water intended to human consumption to be unsafe [1]. Even though the use of pesticides has many decades, the development of analytical methods for their determination still remains a hot topic in analytical chemistry [5][6][7].…”