An ionic liquid-magnetic graphene composite for magnet dispersive solid-phase extraction of triazine herbicides in surface water followed by high performance liquid chromatography

摘要: A new ionic liquid-magnetic graphene (IL-MG) composite was used as the adsorbent in magnetic dispersive solid-phase extraction to rapidly extract and isolate triazine herbicides from surface water. IL-MG synthesized by a simple time-saving one-pot strategy where synthesis of Fe3O4, modification with an IL, reduction oxide were conducted at same time. An IL applied enrich interaction mechanism between analytes (π–π, hydrophobic interaction, electrostatic interaction). Moreover, Fe3O4 nanoparticles acted spacers, inserting layers prevent aggregation graphene, which improved adsorption ability because large specific area IL-MG. The resultant had hierarchical flake structures showed high capacity (8266.0–12 324.1 μg g−1) toward herbicides. Under suitable conditions, linearity for achieved range 0.55–500 ng mL−1 detection limit 0.09–0.15 quantitation 0.31–0.51 mL−1, enrichment factor 83-fold, indicated that proposed method could be successfully determination