Facile fabrication of magnetic covalent organic frameworks and their application in selective enrichment of polychlorinated naphthalenes from fine particulate matter

Wenjing Guo, Wenli Wang, Yixin Yang, Shasha Zhang, Baichuan Yang, Wende Ma, Yu He, Zian Lin*, Zongwei Cai*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

16 Citations (Scopus)

Abstract

Magnetic covalent organic frameworks (Fe3O4@TPPCl4) were synthesized via a one-pot process in which magnetic nanoparticles (Fe3O4@MNP) served as a magnetic core and 2,4,6-trihydroxy-1,3,5-benzenetricarbaldehyde (TP) and 2,2′,5,5′-tetrachlorobenzidine (PCl4) as two building blocks to form a shell. The as-prepared Fe3O4@TPPCl4 nanoparticles have superior features, including large surface area (186.5 m2 g−1), high porosity, strong magnetic responsiveness (42.6 emu g−1), high chlorine content, and outstanding thermal stability, which make them an ideal adsorbent for highly selective enrichment of polychlorinated naphthalenes (PCNs). Combining with atmospheric pressure gas chromatography tandem mass spectrometry (APGC-MS/MS), a simple analytical method of Fe3O4@TPPCl4-based magnetic solid-phase extraction (MSPE)-APGC-MS/MS was developed, which exhibited good linearity (r ≥ 0.9991) for eight PCNs in the concentration range 0.1–100 ng L−1. Moreover, low detection limits (0.005–0.325 ng L−1), high enrichment factors (46.62–81.97-fold), and good relative standard deviations (RSDs) of inter-day (n = 3, 1.64 to 7.44%) and day-to-day (n = 3, 2.62 to 8.23%) were achieved. This method was successfully applied to the selective enrichment of PCNs in fine particulate matter (PM)2.5 samples, and ultra-trace PCNs were found in the range 1.56–3.75 ng kg−1 with satisfactory recoveries (93.11–105.81%). The successful application demonstrated the great potential of Fe3O4@TPPCl4 nanoparticles as an adsorbent for enrichment of halogenated compounds. Graphical abstract: [Figure not available: see fulltext.]

Original languageEnglish
Article number91
JournalMicrochimica Acta
Volume188
Issue number3
DOIs
Publication statusPublished - 18 Feb 2021

Scopus Subject Areas

  • Analytical Chemistry

User-Defined Keywords

  • Adsorbent
  • APGC-MS/MS
  • FeO@TPPCl nanoparticles
  • Halogenated compound enrichment
  • Magnetic covalent organic frameworks
  • Magnetic solid-phase extraction
  • PM samples
  • Polychlorinated naphthalenes

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