Diverse pore-sized sulfonic acid covalent organic frameworks for solid-phase extraction of fluoroquinolones in food samples

IF 6.1 1区化学 Q1 CHEMISTRY, ANALYTICAL Talanta Pub Date : 2025-11-01 Epub Date: 2025-04-18 DOI:10.1016/j.talanta.2025.128142

Shi-qi Ao , Shuang-Ping Liu , Yun Jiang , Xiu-Ping Yan , Hai-Long Qian

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Abstract

Tuning the pore size of covalent organic frameworks (COFs) to achieve maximum adsorption performance is an effective way for promoting the enrichment of trace fluoroquinolones (FQs) in food, but it remains challenging. Herein, we prepare three pore-sized sulfonic acid functionalized COFs (SF-COFs), named TPS, TBS, and TSS, to investigate the effect of pore size on the adsorption efficiency of FQs. These three SF-COFs exhibit excellent adsorption capacities for FQs including enrofloxacin (ENR), norfloxacin (NOR), and ciprofloxacin (CIP). Notably, TBS achieves a maximum adsorption capacity of 627.3 mg g⁻¹ for NOR, resulting from its suitable pore size (1.6 times larger than the size of FQs). Accordingly, we further develop a novel TBS based solid-phase extraction to couple with high-performance liquid chromatography for determination of FQs in various foods, which achieves rapid extraction (10 min), low detection limits (0.007–0.01 ng mL⁻¹), wide linear range (0.1–1000 ng mL⁻¹), and good recoveries (83.7%–105.2%).

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不同孔径磺酸共价有机框架固相萃取食品样品中的氟喹诺酮类药物

调整共价有机骨架（COFs）的孔径以达到最大的吸附性能是促进食品中痕量氟喹诺酮（FQs）富集的有效途径，但仍具有挑战性。在此，我们制备了三种孔径大小的磺酸功能化COFs (SF-COFs)，分别命名为TPS、TBS和TSS，研究孔径大小对FQs吸附效率的影响。这三种SF-COFs对恩诺沙星（ENR）、诺氟沙星（NOR）和环丙沙星（CIP）等FQs均表现出优异的吸附能力。值得注意的是，由于合适的孔径（比FQs大1.6倍），TBS对NOR的最大吸附量为627.3 mg g−1。因此，我们进一步开发了一种新的基于TBS的固相萃取与高效液相色谱耦合用于各种食品中FQs的检测，该方法具有快速（10 min）、低检出限（0.007 ~ 0.01 ng mL−1）、宽线性范围（0.1 ~ 1000 ng mL−1）和良好的回收率（83.7% ~ 105.2%）。

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来源期刊

Talanta 化学-分析化学

CiteScore

12.30

自引率

4.90%

发文量

861

审稿时长

29 days

期刊介绍： Talanta provides a forum for the publication of original research papers, short communications, and critical reviews in all branches of pure and applied analytical chemistry. Papers are evaluated based on established guidelines, including the fundamental nature of the study, scientific novelty, substantial improvement or advantage over existing technology or methods, and demonstrated analytical applicability. Original research papers on fundamental studies, and on novel sensor and instrumentation developments, are encouraged. Novel or improved applications in areas such as clinical and biological chemistry, environmental analysis, geochemistry, materials science and engineering, and analytical platforms for omics development are welcome. Analytical performance of methods should be determined, including interference and matrix effects, and methods should be validated by comparison with a standard method, or analysis of a certified reference material. Simple spiking recoveries may not be sufficient. The developed method should especially comprise information on selectivity, sensitivity, detection limits, accuracy, and reliability. However, applying official validation or robustness studies to a routine method or technique does not necessarily constitute novelty. Proper statistical treatment of the data should be provided. Relevant literature should be cited, including related publications by the authors, and authors should discuss how their proposed methodology compares with previously reported methods.