Voltammetric Analysis of Pesticides

Tonle, K Ignas; Ngameni, Emmanuel

doi:10.5772/18623

Cited by 9 publications

(5 citation statements)

References 104 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pesticides are intensively used throughout the world as defoliants or against weed and pests in a large variety of crops [180,181]. They are known as highly toxic chemicals, and their utilization presents negative effects for the surface water and soils where they diffuse during their application [182]. Thus, in the scope of OMEs devoted to the implementation of electrochemical devices suitable for the detection and the sensing of pesticides, Tcheumi et al [130] performed the electrochemical analysis of methylparathion (MP) pesticide by the means of a GCE modified by the coating of a gemini surfactant-intercalated clay mineral.…”

Section: Electroanalytical Applications Of Omesmentioning

confidence: 99%

Organoclay-modified electrodes: preparation, characterization and recent electroanalytical applications

Tonlé

Ngameni

Tchieno

et al. 2015

J Solid State Electrochem

Self Cite

View full text Add to dashboard Cite

Amperometric sensors dedicated to the determination of pollutants and other compounds of interest face daily a great challenge: the development of sensitive, reproducible and low-cost devices allowing fast analyses. This review deals with the beneficial role and application of organoclays exploited as sensing materials in various fields of electroanalysis, for the past 15 years (period 2000-2014). After a description of different preparation methods leading to clay minerals chemically modified by organic compounds, the common methods used for their characterization are exposed; then, their application as electrode modifiers is described, covering several approaches that were developed to enhance either the sensitivity or the selectivity of the indexed organoclay-based sensors. Finally, a brief description of voltammetric methods frequently used for electroanalytical purposes is given, followed by an update of recent and salient results achieved for the detection of inorganic and organic electroactive compounds or ions.

show abstract

Section: Electroanalytical Applications Of Omesmentioning

confidence: 99%

Organoclay-modified electrodes: preparation, characterization and recent electroanalytical applications

Tonlé

Ngameni

Tchieno

et al. 2015

J Solid State Electrochem

Self Cite

View full text Add to dashboard Cite

show abstract

“…The essence of these methods is the same -electrode processes on working electrodes are triggered by pulse potential changes with a constant or increasing amplitude, which, at the end of the pulse duration, results in the measurement of the faradaic current, while at the same time the capacitive current almost completely disappears. The result of the measurement is the current peak whose height is directly proportional to the concentration of the analyte (Tonle & Ngameni, 2011.). The most commonly applicable are the differential pulse voltammetry (DPV) and square-wave voltammetry (SWV).…”

Section: Pulse Methodsmentioning

confidence: 99%

“…Cyclic voltammogram gives five important data: cathode and anode peaks corresponding to cathode and anode currents and the value of half potential. Those data, as well as their mutual relations, are parameters for determining the type of reaction on the electrode (reversible, irreversible, or quasi reversible) (Tonle & Ngameni, 2011.). Any electrochemical pesticide investigation reported recently has been initiated by cyclic voltammetry.…”

Section: Cyclic Voltammetrymentioning

confidence: 99%

A mini-review of electroanalytical methods for pesticides quantification

Jevtić¹,

Stanković²,

Jokić³

et al. 2019

Univ thought Publ nat sci

View full text Add to dashboard Cite

This review paper shows the progress made in the last five years in electrochemical methods applied for the purpose of detection and quantification of pesticides -nowadays the most serious pollutants of the environment. Most pesticides can be successfully analyzed by chromatographic techniques, but because of high prices and immobility of the apparatus, the complexity of the method and the necessary special preparation of the sample s, electrochemical methods have been recognized as an excellent alternative solution due to their advantages in speed, economy, simplicity and no exhaustive sample preparation. As the main limitation for use of this methods is electrochemical inactivity of many pesticides, this paper gives the essence of all elctroanalytical methods for pesticide quantification applied in last period, with an overview of the electrode materials and modifiers applied in a purpose to enhance analytical procedures application and characteristics of electrochemical sensors.

show abstract

“…Cyclic voltammetry-a simple, easy, and common technique-is a front-line tool to investigate reactions on electrode surfaces. Cyclic voltammetry is generally the first choice to test any material with potential application in these research areas for the determination of redox potentials and rates (for heterogeneous electron transfer and coupled chemical reactions) [15][16][17][18][19][20][21]. However, the selection of a feasible method to explore reactions at the electrode surface is essential because of the complex nature of these reactions, i.e., electron transfer with chemically coupled reactions [22,23].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Different Electrochemical Methodologies for Electrode Reactions: A Case Study of Paracetamol

Masood,

Muhammad,

Tahiri

2024

Electrochem

View full text Add to dashboard Cite

Understanding electrochemical reactions at the surface of electrodes requires the accurate calculation of key parameters—the transfer coefficient (α), diffusion coefficient (D0), and heterogeneous electron transfer rate constant (k0). The choice of method to calculate these parameters requires careful consideration based on the nature of the electrochemical reaction. In this study, we conducted the cyclic voltammetry of paracetamol to calculate the values of these parameters using different methods and present a comparative analysis. Our results demonstrate that the Ep − Ep/2 equation for α and the modified Randles–Ševčík equation for D0 is particularly effective for the calculations of these two parameters. The Kochi and Gileadi methods are reliable alternatives for the calculation of k0. Nicholson and Shain’s method using the equation k0 = Ψ(πnD0Fν/RT)1/2 gives the overestimated values of k0. However, the value of k0 calculated using the plot of ν−1/2 versus Ψ (from the Nicholson and Shain equation, where ν is scan rate) agrees well with the values calculated from the Kochi and Gilaedi methods. This study not only identifies optimal methodologies for quasi-reversible reactions but also contributes to a deeper understanding of electrochemical reactions involving complex electron transfer and coupled chemical reactions, which can be broadly applicable in various electrochemical studies.

show abstract

Voltammetric Analysis of Pesticides

Cited by 9 publications

References 104 publications

Organoclay-modified electrodes: preparation, characterization and recent electroanalytical applications

Organoclay-modified electrodes: preparation, characterization and recent electroanalytical applications

A mini-review of electroanalytical methods for pesticides quantification

Comparison of Different Electrochemical Methodologies for Electrode Reactions: A Case Study of Paracetamol

Contact Info

Product

Resources

About