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

Abstract

A new ionic liquid-magnetic graphene (IL-MG) composite was used as the adsorbent in magnetic dispersive solid-phase extraction to rapid extract and isolate triazine herbicides from surface water. IL-MG was synthesized by a simple and time-saving one-pot strategy that the synthesis of magnetic Fe3O4, the modification with IL, and the reduction of graphene oxide to graphene were conducted at the same time. IL was applied to enrich the interaction mechanism between IL-MG and analytes (π–π, hydrophobic interaction, and electrostatic interaction). Moreover, ILs and Fe3O4 nanoparticles acted as spacer inserting between the layers of graphene to prevent the aggregation of graphene, which improved adsorption ability because of the large specific surface area of IL-MG. The resultant IL-MG had hierarchical flake structures and showed high adsorption capacity (8266.0–12324.1 μg g−1) to triazine herbicides. Under the suitable conditions, the linearity for triazine herbicides was achieved in a range of 0.55–500 ng mL−1 with a detection limit of 0.09–0.15 ng mL−1 and a quantitation limit of 0.31–0.51 ng mL−1, and the enrichment factor was 83-fold, which indicated that the proposed method could be successfully applied for the determination of triazine herbicides in surface water.

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Publication details

The article was received on 03 Aug 2017, accepted on 01 Nov 2017 and first published on 03 Nov 2017


Article type: Paper
DOI: 10.1039/C7AN01290J
Citation: Analyst, 2017, Accepted Manuscript
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    Ionic liquid-magnetic graphene composite for magnet dispersive solid-phase extraction of triazine herbicides in surface water followed by high performance liquid chromatography

    H. Zhang, Y. Yuan, Y. Sun, C. Niu, F. Qiao and H. Yan, Analyst, 2017, Accepted Manuscript , DOI: 10.1039/C7AN01290J

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