4.6 Article

Piperazine-linked metal covalent organic framework-coated fibers for efficient electro-enhanced solid-phase microextraction of chlorophenols

Journal

JOURNAL OF CHROMATOGRAPHY A
Volume 1692, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.chroma.2023.463847

Keywords

Metal covalent organic framework (MCOF); Electro-enhanced solid-phase; microextraction (EE-SPME); GC-MS; MS; Chlorophenols (CPs)

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In this study, a stable and highly conductive copper-doped phthalocyanine metal covalent organic framework (CuPc-MCOF) was synthesized and used as an extraction material for trace chlorophenols (CPs). By combining electro-enhanced solid-phase microextraction (EE-SPME) with gas chromatography-tandem mass spectrometry (GC-MS/MS), a sensitive and reproducible CPs detection method was established. The developed CuPc-MCOF coating material showed excellent extraction performance and potential application in the analysis of trace polar pollutants from complex samples.
Conductive covalent organic frameworks (COFs) have received considerable attention and are critical in various applications such as electro-enhanced solid-phase microextraction (EE-SPME). In this work, a novel piperazine-linked copper-doped phthalocyanine metal covalent organic framework (CuPc-MCOF) was synthesized with good stability and high electrical conductivity. The synthesized CuPc-MCOF was then used as an EE-SPME coating material for extraction of five trace chlorophenols (CPs), includ-ing 2,4-dichlorophenol (2,4-DCP), 2,6-dichlorophenol (2,6-DCP), 2,4,6-trichlorophenol (2,4,6-TCP), 2,4,5-trichlorophenol (2,4,5-TCP) and 2,4,5,6-tetrachlorophenol (2,4,5,6-TCP), exhibiting excellent extraction per-formance because of various synergistic forces between CuPc-MCOF fibers and CPs. By combining EE-SPME with gas chromatography-tandem mass spectrometry (GC-MS/MS), a sensitive method for CPs de-tection was established with a low limit of detection (0.8-5 ng L -1) and good reproducibility (RSD <= 8.4%, n = 3). This method was then successfully applied to the analysis of trace CPs in real samples of sea-water and seafood. Results showed that the developed CuPc-MCOF coating material possessed superior extraction performance and potential application in extraction of trace polar pollutants from complex samples.(c) 2023 Elsevier B.V. All rights reserved.

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