N-DOPED POROUS CARBON DERIVED FROM A DEEP EUTECTIC SOLVENT AND ITS APPLICATION IN SOLID-PHASE EXTRACTION OF PROFENOFOS FROM FRUITS

Abstract

Porous N-doped carbon materials with glucose and urea derived from a deep eutectic solvent, and their performance in determining pesticides were investigated. The carbon materials were characterized with nitrogen absorption, transmission electron microscopy, X-ray photoelectron spectroscopy, and the results showed that they had high specific surface areas, pore volumes and rich functional groups. Under optimized conditions, this method showed a good linearity (0.2–2.0 µg/mL) and high sensitivity (detection limit of 0.023 µg/mL, S/N = 3). The proposed method was successfully applied in an analysis of a fruit sample with recoveries ranging from 97.2 % to 103.3 %, and good reproducibility was achieved. This work revealed great potentials of a porous N-doped carbon material used as an excellent sorbent material in analyzing organophosphorus pesticides.