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Knitting aromatic polymers for efficient solid-phase microextraction of trace organic pollutants

Liu, Shuqin, Hu, Qingkun, Zheng, Juan, Xie, Lijun, Wei, Songbo, Jiang, Ruifen, Zhu, Fang, Liu, Yuan, Ouyang, Gangfeng
Journal of chromatography 2016 v.1450 pp. 9-16
BTEX (benzene, toluene, ethylbenzene, xylene), Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, alkylation, benzene, chromatography, coatings, detection limit, ethylbenzene, pollutants, polycyclic aromatic hydrocarbons, polymers, porous media, solid phase microextraction, thermal stability, toluene, transmission electron microscopy, xylene
A series of knitting aromatic polymers (KAPs) were successfully synthesized using a simple one-step Friedel-Crafts alkylation of aromatic monomers and were characterized by transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). Then, as-synthesized KAPs with large surface areas, unique pore structures and high thermal stability were prepared as solid-phase microextraction (SPME) coatings that exhibited good extraction abilities for a series of benzene compounds (i.e., benzene, toluene, ethylbenzene and m-xylene, which are referred to as BTEX) and polycyclic aromatic hydrocarbons (PAHs). Under the optimized conditions, the methodologies established for the determination of BTEX and PAHs using the KAPs-triPB and KAPs-B coatings, respectively, possessed wide linear ranges, low limits of detection (LODs, 0.10–1.13ngL⁻¹ for BTEX and 0.05–0.49ngL⁻¹ for PAHs) and good reproducibility. Finally, the proposed methods were successfully applied to the determination of BTEX and PAHs in environmental water samples, and satisfactory recoveries (93.6–124.2% for BTEX and 77.2–113.3% for PAHs) were achieved. This study provides a benchmark for exploiting novel microporous organic polymers (MOPs) for SPME applications.