Electrochemically prepared three-dimensional reduced graphene oxide-polyaniline nanocomposite as a solid-phase...

Area of Science:

• Materials Science
• Analytical Chemistry
• Environmental Science

Background:

• Pesticide contamination in water poses significant environmental and health risks.
• Sensitive and efficient analytical methods are crucial for detecting trace levels of pesticides like ethion.
• Developing advanced sorbent materials is key to improving extraction efficiency in sample preparation.

Purpose of the Study:

• To synthesize a three-dimensional reduced graphene oxide-polyaniline nanocomposite.
• To utilize this nanocomposite as a sorbent for solid-phase microextraction (SPME) of ethion.
• To develop a sensitive analytical method for ethion determination in water samples.

Main Methods:

• A two-step electrochemical method was employed for nanocomposite synthesis.
• Fourier transform infrared spectroscopy, FESEM, and TGA were used for characterization.
• Optimization of SPME parameters including salt addition, stirring rate, pH, temperature, and time.
• Analysis was performed using negative corona discharge ionization ion mobility spectrometry.

Main Results:

• The synthesized nanocomposite was successfully prepared and characterized.
• Optimal extraction conditions were determined for ethion.
• The method exhibited good linearity (1.0-70 μg L⁻¹) and a low limit of detection (0.4 μg L⁻¹).
• High precision (1.7-4.7% RSD) and recovery (84-98% in real samples) were achieved.

Conclusions:

• The 3D reduced graphene oxide-polyaniline nanocomposite is an effective sorbent for ethion SPME.
• The developed method is sensitive, precise, and suitable for ethion analysis in water.
• This approach offers a promising tool for environmental monitoring of pesticide residues.