固相微萃取
化学
萃取(化学)
色谱法
气相色谱法
涂层
热稳定性
检出限
纤维
气相色谱-质谱法
有机化学
质谱法
作者
Shuhui Huo,Xiaohui Deng,Nan Yang,Mengya Qin,Xiaonan Zhang,Xiaoqiang Yao,Cuixiang An,Pengxin Zhou,Xiaoquan Lu
标识
DOI:10.1016/j.cej.2024.148562
摘要
In this study, a durable hydrophobicity hydrazone covalent organic framework (BTCH-PTA-COF) has been developed as fiber coating, which was applied to solid-phase microextraction (SPME) of polycyclic aromatic hydrocarbons (PAHs). The hydrophobic and π-π packing interactions between BTCH-PTA-COF and PAHs were confirmed by contact angle experiments and Van der Waals surface electrostatic potential analysis. Further, large specific surface area, good chemical and thermal stability have positive promoting effect on extraction. The method of wide linearity (0.25–300 µg·L−1), low detection limits (0.03–0.05 µg·L−1) and high enrichment factors (767–1411) for the detection of PAHs is explored, coupling BTCH-PTA-COF based SPME with gas chromatography with hydrogen flame detector (GC-FID). The relative standard deviations (RSDs) for inter-day and intra-day extractions of PAHs are ranging from 4.1 % to 9.6 % and 2.9 % to 6.4 %, respectively. The method successfully detected and quantified trace PAHs in tea beverages and river water samples with recoveries from 88.5 % to 104.8 %. The BTCH-PTA-COF coated fiber is ultra-stable in recycled extraction and reused at least 120 times, which could surpass published and commercial SPME fiber.
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