Magnetic Carbon as an Adsorbent for the Enrichment of Carbamate Pesticides in Magnetic Solid Phase Extraction Prior to High Performance Liquid Chromatography.

The article focuses on the development and validation of a simple one-step synthesis method to prepare magnetic carbon material used as an adsorbent in magnetic solid phase extraction (MSPE) for preconcentrating carbamate pesticides prior to their determination by high performance liquid chromatography with photodiode array detection (HPLC/PDA). The optimized MSPE procedure employed 50 mg of magnetic carbon to extract carbamates from 30 mL fruit sample solutions with rapid vortex-assisted adsorption and elution steps, achieving linear detection ranges of 5–200 μg L⁻¹, limits of detection between 3–40 μg L⁻¹, and satisfactory recoveries (70.2%–120.0%) with relative standard deviations below 11.6%. Characterization confirmed the composite nature of the magnetic carbon, which exhibited strong ferromagnetism facilitating easy magnetic separation. The method demonstrated effective enrichment and precision for carbamate pesticide analysis in various fruit samples, offering a rapid, eco-friendly, and straightforward alternative to more complex sorbent preparation techniques.