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A β-cyclodextrin/fluorinated covalent triazine framework hybrid fiber for synergistic solidphase microextraction of aflatoxins in cereals.

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Title: A β-cyclodextrin/fluorinated covalent triazine framework hybrid fiber for synergistic solidphase microextraction of aflatoxins in cereals.
Authors: Pan, Lining1 (AUTHOR), Liu, Kunling2 (AUTHOR), Wang, Bing1 (AUTHOR), Wang, Nan2 (AUTHOR), Xie, Fuwei1 (AUTHOR), Nie, Cong1 (AUTHOR) congnie@aliyun.com, Qin, Yaqiong1 (AUTHOR), Wang, Xiaoyu1 (AUTHOR), Zhao, Wenjie1,2,3 (AUTHOR) wjiezh@126.com
Source: Food Chemistry. Dec2025:Part 3, Vol. 496, pN.PAG-N.PAG. 1p.
Subjects: Aflatoxins, Cereal products, Solid phase extraction, Cyclodextrins, Porous materials, Food safety, Density functional theory, High performance liquid chromatography
Abstract: A β-cyclodextrin-functionalized fluorinated covalent triazine framework (β-CD/FCTF) was developed as a high-performance solid-phase microextraction (SPME) coating for efficient extraction of aflatoxins (AFs) from cereals. The composite synergistically combines the high surface area of FCTF with the host-guest recognition capability of β-CD and polar interactions afforded fluorine/triazine groups. Coupled with high-performance liquid chromatography with fluorescence detection, the method achieved detection limits of 0.02–0.11 ng/g and quantification limits of 0.06–0.36 ng/g. Recoveries from spiked cereal samples ranged from 84.5 to 130 % (RSD ≤ 10.2 %). Density functional theory (DFT) calculations confirmed enhanced adsorption through synergistic host-guest inclusion, hydrogen bonding, and F–π interactions. The coating showed 2.1–2.3 fold higher enrichment than pure FCTF, excellent anti-interference, and reusability. This work establishes a reliable and robust analytical platform for trace AFs detection in food commodities and proposes a generalizable covalent grafting strategy for the rational design of functional porous materials in food safety monitoring. • A β-CD modified fluorinated covalent triazine framework was developed for efficient aflatoxin extraction. • Extraction mechanism revealed by DFT calculations shows synergistic host-guest and polar interactions. • The coating exhibits high enrichment factors, excellent anti-interference ability, and outstanding reusability. • Method enables reliable detection of trace aflatoxins in complex cereal samples. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:A β-cyclodextrin-functionalized fluorinated covalent triazine framework (β-CD/FCTF) was developed as a high-performance solid-phase microextraction (SPME) coating for efficient extraction of aflatoxins (AFs) from cereals. The composite synergistically combines the high surface area of FCTF with the host-guest recognition capability of β-CD and polar interactions afforded fluorine/triazine groups. Coupled with high-performance liquid chromatography with fluorescence detection, the method achieved detection limits of 0.02–0.11 ng/g and quantification limits of 0.06–0.36 ng/g. Recoveries from spiked cereal samples ranged from 84.5 to 130 % (RSD ≤ 10.2 %). Density functional theory (DFT) calculations confirmed enhanced adsorption through synergistic host-guest inclusion, hydrogen bonding, and F–π interactions. The coating showed 2.1–2.3 fold higher enrichment than pure FCTF, excellent anti-interference, and reusability. This work establishes a reliable and robust analytical platform for trace AFs detection in food commodities and proposes a generalizable covalent grafting strategy for the rational design of functional porous materials in food safety monitoring. • A β-CD modified fluorinated covalent triazine framework was developed for efficient aflatoxin extraction. • Extraction mechanism revealed by DFT calculations shows synergistic host-guest and polar interactions. • The coating exhibits high enrichment factors, excellent anti-interference ability, and outstanding reusability. • Method enables reliable detection of trace aflatoxins in complex cereal samples. [ABSTRACT FROM AUTHOR]
ISSN:03088146
DOI:10.1016/j.foodchem.2025.146841