β-Ketoenamine-linked covalent organic framework coating for ultra-high-performance solid-phase microextraction of polybrominated diphenyl ethers from environmental samples
| Autor: | Wei-Kun Meng, Lu Liu, Guiju Xu, Ru-Song Zhao, Yan-Sheng Zhou, Ming-Lin Wang, Jin-Ming Lin, Xia Wang |
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| Rok vydání: | 2019 |
| Předmět: |
Detection limit
Materials science General Chemical Engineering 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Solid-phase microextraction 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences Crystallinity Polybrominated diphenyl ethers Chemical engineering Coating Specific surface area engineering Environmental Chemistry Thermal stability 0210 nano-technology Covalent organic framework |
| Zdroj: | Chemical Engineering Journal. 356:926-933 |
| ISSN: | 1385-8947 |
| Popis: | Covalent organic frameworks (COFs) via Schiff base-type linkages (1,3,5-triformylphloroglucinol–paraphenylenediamine, TpPa-1), as an ideal coating, possesses significant potential for solid-phase microextraction (SPME) due to their fascinating properties, such as outstanding thermal and chemical stabilities, inherent porosity, and high crystallinity. A novel SPME device was fabricated based on TpPa-1 as an enrichment coating for capturing trace polybrominated diphenyl ethers (PBDEs). This TpPa-1 coating exhibited a superior enrichment capacity in “catching” PBDEs over commercial SPME fibers. Such performance is attributed to multiple factors, including the coating’s hydrophobic nature, π-π stacked architectures, large specific surface area, high thermal stability, and size-matching effect. High enhancement factors of 2035–6859, low detection limits of 0.0058–0.022 ng L−1, satisfactory linear range of 0.01–100 ng L−1, good repeatability of 4.86%–9.33%, and excellent reproducibility of 5.62%–9.85% were achieved. Finally, as expected, as the most sensitive SMPE technique for detecting PBDEs, to the best of our knowledge, the developed SPME procedure in combination with gas chromatography–negative chemical ion–mass spectrometry analysis was proven to be ultrasensitive, dependable, and practical in analyzing PBDE species in real water. These exceptional results signify that the proposed method offers a fresh prospect to extend the potential applications of COFs to pick up pollutants at ultra-low levels from environmental samples. |
| Databáze: | OpenAIRE |
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