Electrooxidation and determination of methacetin (p-acetanisidide) by square wave voltammetry using multiwalled carbon nanotube electrode

Abstract

A multiwall carbon nanotube paste electrode (MWCNTPE) was fabricated to investigate the detailed electrochemical behavior of methacetin and achieve its sensitive electroanalytical determination. The sensitive and selective square wave anodic peak seen at +1.06 V was linearly related to methacetin concentration in the range of 0.11 to 22.3 mg L À1 [0.665 to 135 mM]. The limit of detection (LOD) and the limit of quantification (LOQ) were 0.032 mg L À1 [0.193 mM] and 0.11 mg L À1 [0.665 mM],respectively. The percentage recovery of methacetin calculated from natural lake water samples spiked at the 5.0 mg mL À1 [30.3 mM] level was 94.2% with a relative standard deviation of 0.21%. The considerably high recoveries and low standard deviations were evidence for the high accuracy and precision of the recommended method. The recovery of 10.0 mg mL À1 [60.5 mM] methacetin in the presence of the same concentrations of other pesticides such as benzanilide, propanil, tribenuron methyl, rimsulfuron, metsulfuron methyl and chlorsulphuron ranged from 89.2% to 98.3%. The oxidation peak of 10 mg L À1 [65.3 mM] dopamine appeared at +0.740 V(vs. Ag/AgCl) and did not display a significant interfering effect, therefore methacetin and dopamine could be simultaneously determined.

Voltammetric determination of phenmedipham herbicide using a multiwalled carbon nanotube paste electrode

“…p-Acetanisidide (methacetin) is a member of the family of acetanilide compounds and its sensitive voltammetric determination was carried out from the peak at +1060 mV in pH 2.4 B-R buffer solution. 41 Although p-acetanisidide gave a peak at +1120 mV in the presence of the phenmedipham compound, there was no significant interference effect. Phenmedipham herbicide at a concentration of 1 mg/L could be determined with +1.3%, -1.3%, and -7.7% relative error in the presence of p-acetanisidide (methacetin) at 1 mg/L, 5 mg/L, and 10 mg/L, respectively.…”

An Electrochemical Strategy for Detection of Trace‐Level Binapacryl Using Square‐Wave Cathodic Stripping Voltammetry

“…[38] These methods require relatively expensive costs, long pre-processes, science expertise, using too much solvent and, long analysis time. [39][40] Due to the shortcomings of general analytical methods, scientists have turned to alternative methods. Among these methods, electrochemical ones with superior properties are of great interest.…”

A Simple and Sensitive Square Wave Stripping Pathway for the Analysis of Desmedipham Herbicide by Modified Carbon Paste Electrode Based on Hematite (α‐Fe2O3 Nanoparticles)

“…Furthermore, a new method is required for analysis of the desmedipham at accurately and precision in sugar beets usage dosages, maximum residual limited, degradation products toxicity, environmental contamination and human health. The voltammetric methods can be an alternative to traditionally analytical methods because of a remarkable sensitivity and selectivity, the ability also to determination the organic substances such as vitamins , phenolic compounds , amino acids , pharmaceutical drugs and pesticides at the nano molar level on the variety working electrodes especially carbon types. Differential pulse voltammetry (DPV) and square wave voltammetry (SWV) are employed for the assays most of these targeted substances.…”