Loading controlled magnetic carbon dots for microwave-assisted solid-phase extraction: Preparation, extraction...

Area of Science:

• Environmental Chemistry
• Analytical Chemistry
• Materials Science

Background:

• Polycyclic aromatic hydrocarbons (PAHs) are significant environmental pollutants.
• Efficient extraction methods are crucial for detecting PAHs in aqueous samples.
• Existing methods often require long extraction times and complex procedures.

Purpose of the Study:

• To develop a novel adsorbent for microwave-assisted magnetic solid-phase extraction (MAMSPE).
• To investigate the extraction performance of the developed adsorbent for PAHs.
• To apply the method for analyzing PAHs in environmental water samples.

Main Methods:

• Synthesis of carbon dot@poly(glycidyl methacrylate)@Fe3O4 nanoparticles.
• Characterization using TEM, FTIR, Raman spectroscopy, and VSM.
• Optimization of MAMSPE parameters (microwave power, time, desorption).
• Analysis of PAHs using HPLC-UV/Vis detection.

Main Results:

• The nano-adsorbent was successfully synthesized and characterized.
• Optimized MAMSPE showed short extraction times and wide linear ranges (0.02-200 μg/L).
• Low detection limits (20-90 ng/L) and high recoveries (86.0-124.2%) were achieved for PAHs in real samples.

Conclusions:

• The developed carbon dot-based nano-adsorbent is effective for PAH extraction.
• MAMSPE offers a fast and reliable method for preconcentrating trace PAHs.
• This technique shows promise for environmental water quality monitoring.