▎ 摘　　要

1-Vinyl-3-hexylimidazolium bromide ionic liquid was attached onto graphene oxide sheets through the electrostatic interaction between ionic liquid and graphene oxide. After polymerization and reduction, a poly(ionic liquid)-stabilized graphene composite material (PIL-G) was obtained and characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, and ultraviolet. visible spectrometry. The PIL- G was firstly used as solid. phase extraction (SPE) adsorbent for organophosphorus pesticides (OPPs). The factors that affected the extraction efficiency of analytes, including adsorbent amount, sample volume, sample flow rate, eluent solvent and its volume were optimized. Combined with HPLC method, good linearity for the determination of OPPs was obtained in a range of 5 - 200 mu g/L with correlation coefficients (R-2) of 0. 9908-0. 9995. The recoveries of OPPs at three spiked levels ranged from 80. 0% to 110. 0% with RSD less than 4. 5%. In comparison with G, PIL. G materials as SPE adsorbent could enhance the dispersion of graphene and exhibited higher extraction efficiency for OPPs. The proposed method was suitable for the determination of OPPs in environmental water samples.