Journal
MICROCHIMICA ACTA
Volume 186, Issue 1, Pages -Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-018-3060-7
Keywords
Covalent organic framework; Multiple-linking-site; SPME; Gas chromatography
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Funding
- Open Project of State Key Laboratory of Supramolecular Structure and Materials, Jilin University, China [sklssm201815]
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A dual-pore covalent organic framework (COF) that contains micropores and mesopores was prepared from 2,4,6-triphenoxy-1,3,5-triazine (TPT). A building block is used in which double linking sites were introduced at each branch of a C-3-symmetric skeleton. The COF is shown to be a viable coating for fibers for solid-phase microextraction of phthalic acid esters (PAEs). Its high specific surface, high hydrophobicity, and wide pore size distribution of a TPT-COF coated fiber result in extraordinarily powerful extraction of PAEs. The enrichment factor is up to 7790 under optimum conditions. The method has detection limits that range between 5 and 95ngL(-1). The inter-batch relative standard deviations are between 3.1 and 10.9%, and those for intra-batch assays are from 0.8 to 4.7%. The TPT-COF coated fibers were applied to the extraction of PAEs from (spiked) juice samples, and satisfactory recoveries were achieved.
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