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Therefore, sensitive and reliable analytical methods for trace BTEX monitoring are urgently needed. In this work, a novel imine\u2010linked covalent organic framework (TAPB\u2010Bpy) containing bipyridine units was synthesized via Schiff\u2010base reaction and applied as a dispersive solid\u2010phase extraction (d\u2010SPE) adsorbent for the preconcentration of BTEX coupled with gas chromatography\u2010flame ionization detection (GC\u2010FID). Benefiting from its highly ordered porous structure, good thermal stability and abundant \u03c0\u2010electron\u2010rich sites, TAPB\u2010Bpy exerts strong \u03c0\u2010\u03c0 stacking and weak C\u2010H\u00b7\u00b7\u00b7N hydrogen bonding interactions with BTEX molecules, as verified by XPS analysis. Under optimized conditions, the method achieved a linear range of 0.003\u201310\u00a0\u00b5g\u00a0L\n                    <jats:sup>\u2212<\/jats:sup>\n                    <jats:sup>1<\/jats:sup>\n                    , limits of detection (LODs) of 0.001\u00a0\u00b5g\u00a0L\n                    <jats:sup>\u2212<\/jats:sup>\n                    <jats:sup>1<\/jats:sup>\n                    for all four analytes, and good reproducibility with relative standard deviations (RSDs) below 8.1%. The adsorbent retained stable extraction efficiency after at least 30 reuse cycles, showing favorable cost\u2010effectiveness. Compared with recently reported SPE\/SPME methods for BTEX determination, our approach provides 2\u201010\u2010fold lower LODs, a broader linear range, and superior reusability. When applied to real water samples including tap water, river water, rainwater, and industrial wastewater, satisfactory recoveries ranging from 90.9% to 109.6% were obtained, with RSDs between 1.0% and 9.0%. These results indicate that TAPB\u2010Bpy is a promising d\u2010SPE adsorbent for trace BTEX analysis in complex environmental matrices.\n                  <\/jats:p>","DOI":"10.1002\/jssc.70529","type":"journal-article","created":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T08:52:24Z","timestamp":1789116744000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Bipyridine\u2010functionalized Covalent Organic Framework as a Reusable Adsorbent for Trace BTEX Detection in Water Samples"],"prefix":"10.1002","volume":"49","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3248-6108","authenticated-orcid":false,"given":"Zhiqun","family":"Xu","sequence":"first","affiliation":[{"name":"Suzhou Chien\u2010shiung Institute of Technology  Taicang China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fangpei","family":"Ma","sequence":"additional","affiliation":[{"name":"Suzhou Chien\u2010shiung Institute of Technology  Taicang China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tianju","family":"Chen","sequence":"additional","affiliation":[{"name":"Center For Biomedical Optics and Photonics &amp; College of Physics and Optoelectronic Engineering Shenzhen University  Shenzhen China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bo","family":"Hou","sequence":"additional","affiliation":[{"name":"Suzhou Chien\u2010shiung Institute of Technology  Taicang China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Quan","family":"Cheng","sequence":"additional","affiliation":[{"name":"Suzhou Chien\u2010shiung Institute of Technology  Taicang China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pingping","family":"Fan","sequence":"additional","affiliation":[{"name":"Suzhou Chien\u2010shiung Institute of Technology  Taicang China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yueping","family":"Zheng","sequence":"additional","affiliation":[{"name":"Minxi Vocational and Technical College  Longyan Fujian China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lan","family":"Fang","sequence":"additional","affiliation":[{"name":"Suzhou Chien\u2010shiung Institute of Technology  Taicang China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jianhua","family":"Wang","sequence":"additional","affiliation":[{"name":"Suzhou Chien\u2010shiung Institute of Technology  Taicang China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,9,11]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.buildenv.2024.112100"},{"key":"e_1_2_9_3_1","first-page":"41862","volume-title":"Magnetic Solid Phase Extraction With Octahedral Structured Fe3O4@SiO2@Polydimethylsiloxane Magnetic Nanoparticles as the Sorbent for Determining Benzene, Toluene, Ethylbenzene and Xylenes in Water Samples","author":"Zhang M. 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