ArticleJournal of separation science2026
Bipyridine-functionalized Covalent Organic Framework as a Reusable Adsorbent for Trace BTEX Detection in Water Samples.
Article in Journal of separation science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Benzene, toluene, ethylbenzene, and xylenes (BTEX) are hazardous volatile organic compounds frequently detected in environmental waters, posing serious risks to human health and ecosystems. Therefore, sensitive and reliable analytical methods for trace BTEX monitoring are urgently needed. In this work, a novel imine-linked covalent organic framework (TAPB-Bpy) containing bipyridine units was synthesized via Schiff-base reaction and applied as a dispersive solid-phase extraction (d-SPE) adsorbent for the preconcentration of BTEX coupled with gas chromatography-flame ionization detection (GC-FID). Benefiting from its highly ordered porous structure, good thermal stability and abundant π-electron-rich sites, TAPB-Bpy exerts strong π-π stacking and weak C-H···N hydrogen bonding interactions with BTEX molecules, as verified by XPS analysis. Under optimized conditions, the method achieved a linear range of 0.003-10 µg L
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