College of Food Science and Engineering, Shandong Agricultural University, Taian, 271018, China.
Qilu University of Technology (Shandong Academy of Sciences), Ecology Institute of Shandong Academy of Sciences, Shandong Province Key Laboratory of Applied Microbiology, Jinan, 250014, China.
Anal Methods. 2020 May 21;12(19):2434-2442. doi: 10.1039/c9ay02755f.
Covalent organic frameworks with tunable porous crystallinity and outstanding stability have recently exhibited fascinating pretreatment performance as solid-phase microextraction coatings. In this report, a β-ketoenamine-linked covalent organic framework (TpPa-1) was successfully constructed through a Schiff-base-type reaction between 1,3,5-triformylphloroglucinol (Tp) and para-phenylenediamine (Pa-1). A TpPa-1 coating was then fabricated on a stainless-steel fiber for capturing trace synthetic musks. This TpPa-1 coating exhibited strong interaction with synthetic musks because of its hydrophobicity and π-π affinity. This TpPa-1-based solid-phase microextraction methodology, coupled with gas chromatography-tandem mass spectrometry, provided high enrichment factors (1214-12 487), wide linearity (0.5-1000 ng L-1), low limits of detection (0.04-0.31 ng L-1), and acceptable reproducibility (relative standard deviation, <10%) for nine synthetic musks. Recoveries at three spiked levels in three types of water samples were between 76.2% and 118.7%. These results indicated the promising applicability of the TpPa-1 as a solid-phase microextraction fiber coating for reliably detecting trace concentrations of synthetic musks in the environment.
具有可调孔结晶度和卓越稳定性的共价有机骨架最近作为固相微萃取涂层表现出了迷人的预处理性能。在本报告中，通过 1,3,5-均苯三甲醛（Tp）和对苯二胺（Pa-1）之间的席夫碱型反应成功构建了β-酮亚胺键合的共价有机骨架（TpPa-1）。然后在不锈钢纤维上制备了 TpPa-1 涂层，用于捕获痕量合成麝香。由于其疏水性和π-π亲和力，TpPa-1 涂层与合成麝香表现出强烈的相互作用。基于 TpPa-1 的固相微萃取方法与气相色谱-串联质谱联用，为 9 种合成麝香提供了高富集因子（1214-12487）、宽线性范围（0.5-1000ngL-1）、低检测限（0.04-0.31ngL-1）和可接受的重现性（相对标准偏差，<10%）。在三种水样中的三个加标水平的回收率在 76.2%至 118.7%之间。这些结果表明 TpPa-1 作为固相微萃取纤维涂层具有可靠检测环境中痕量合成麝香的应用潜力。
