Rapid and Sensitive Quantification of the Pesticide Lindane by Polymer Modified Electrochemical Sensor

Abstract

Lindane is documented by the Environmental Protection Agency (EPA) as one of the most toxic registered pesticides. Conventional detection of lindane in the environment requires manual field sampling and complex, time-consuming analytical sample handling relying on skilled labor. In this study, an electrochemical sensing system based on a modified electrode is reported. The system is capable of detecting lindane in aqueous medium in only 20 s. The surface of a conventional carbon electrode is modified with a film of conductive polymer that enables detection of lindane down to 30 nanomolar. The electrode modification procedure is simple and results in a robust sensor that can withstand intensive use. The sensitivity of the sensor is 7.18 µA/µM and the performance was demonstrated in the determination of lindane in spiked ground water. This suggests that the sensor is potentially capable of providing useful readings for decision makers. The rapid and sensitive quantification of lindane in aqueous medium is one step forward to new opportunities for direct, autonomous control of the pesticide level in the environment.

Design of an Electrochemical Sensor Using 2D Sheet-Like Cu@g-C3N4 Transducer Matrix for Electroanalysis of Catechol

“…Further, the regression analysis of Log I p vs Log ν plot gives a relation of Log I p = 0.3994 log ν + 0.0059; R 2 = 0.9973 with slope value near to theoretical value of 0.5, which confirms the dominantly adsorption-controlled electrode process of CTL analysis. 38,39 As the electrochemical property of a sensor is pH-dependent, the electrochemical behavior of the Cu@g-C 3 N 4 modified PGE electrode is studied using different pH (3, 5, 7, 9, and 11 in the presence of 10 μM CTL) of PBS buffer solution. Figure 4C shows the current response of the sensor at different pH values and it indicates that the oxidation peak reached the maximum at pH 7.0.…”

Sustainable Water Monitoring via Analytical Techniques and Protocols Applied in the Assessment of Organochlorine Pesticides

“…The detection of lindane in an aqueous environment by using a polymer-modified electrode was achieved by Noori et al [93]. The measurement time was as short as 20 s and the stability of the electrode for repeated use stretched for over a week.…”

Electrochemical determination of carbendazim in juice samples using carbon composite electrode modified with ion‐exchange resin

“…In this scenario, the main objective of this study was to identify new materials that could be used as electrode modifiers, capable of interacting with CBZ by promoting its preconcentration. There are several reports on the use of different materials as electrode modifiers for the preconcentration of pesticides, such as biochar [20,21], clay materials [22], polymers [23], etc. However, most of these materials require preparation in the laboratory, which is time-consuming and requires expensive equipment.…”