Magnetic phenolic resin core‐shell structure derived carbon microspheres for ultrafast magnetic solid‐phase extraction of triazine herbicides

Abstract

In this study, monodisperse magnetic carbon microspheres were successfully synthesized through the carbonization of phenolic resin encapsulated Fe3O4 core‐shell structures. The magnetic carbon microspheres showed high performance in ultrafast extraction and separation of trace triazine herbicides from environmental water samples. Under optimized conditions, both the adsorption and desorption processes could be achieved in 2 min, and the maximum adsorption capacity for simazine and prometryn were 387.6 and 448.5 μg/g. Coupled with high‐performance liquid chromatography‐ultraviolet detection technology, the detection limit of triazine herbicides was in the range of 0.30–0.41 ng/mL. The mean recoveries ranged from 81.44 to 91.03% with relative standard deviations lower than 7.47%. The excellent magnetic solid‐phase extraction performance indicates that magnetic carbon microspheres are promising candidate adsorbents for the fast analysis of environmental contaminants.

Porous poly(bismaleimide‐co‐divinylbenzene) microspheres as dispersive solid‐phase extraction adsorbent coupled to high‐performance liquid chromatography for the determination of triazine herbicide residues in vegetable samples

“…Jouybari et al [5] established a novel hydrophobic deep eutectic solvent-based dispersive liquidliquid microextraction technique combined with HPLC for the determination of THs residues in fruit and vegetables with the enrichment factor (EF) in the range of 128-155. Pan et al [6] employed monodisperse magnetic carbon microspheres as magnetic solid-phase extraction (MSPE) adsorbent in combination with HPLC for the analysis of THs in environmental water samples with limits of detection (LODs) in the range of 0.30-0.41 ng/mL. Wang et al [7] reported the extraction of THs from rice with pipette tip-SPE using phosphoric acid-activated charcoal modified by chitosan as adsorbent before HPLC, and the LODs were 1.41-3.35 ng/g.…”

“…Pan et al. [6] employed monodisperse magnetic carbon microspheres as magnetic solid‐phase extraction (MSPE) adsorbent in combination with HPLC for the analysis of THs in environmental water samples with limits of detection (LODs) in the range of 0.30–0.41 ng/mL. Wang et al.…”