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河北农业大学胡雪莲&汤轶伟‖【Food Chem.】新型磁-荧光三合一传感平台实现强力霉素高特异高灵敏检测

  • 2026-05-08 09:31:14
河北农业大学胡雪莲&汤轶伟‖【Food Chem.】新型磁-荧光三合一传感平台实现强力霉素高特异高灵敏检测

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介绍 /Introduction

本文提出了一种用于强力霉素磁分离、仿生识别和荧光检测的磁-荧光集成平台(Fe₃O₄-COOH@MIL-101(Cr)@MIPs/b-BCDs)。在该方案中,通过在Fe₃O₄-COOH表面逐层自组装修饰MIL-101(Cr)并与分子印迹聚合物(MIPs)偶联,合成了Fe₃O₄-COOH@MIL-101(Cr)@MIPs。MIL-101(Cr)的引入赋予了Fe₃O₄-COOH@MIL-101(Cr)@MIPs优异的结合能力和传质速率。高亲和力的印迹层增强了Fe₃O₄-COOH@MIL-101(Cr)@MIPs在复杂环境中对强力霉素的精准识别。得益于其固有优势,Fe₃O₄-COOH@MIL-101(Cr)@MIPs表现出令人满意的吸附容量(Qe = 13.19 mg g⁻¹)、良好的传质速率(h = 9.22 mg g⁻¹ min⁻¹)和特异性。引入生物质基碳点(b-BCDs)构建了基于Fe₃O₄-COOH@MIL-101(Cr)@MIPs/b-BCDs的传感平台,该平台表现出良好的分析性能,线性范围为0.05–2 mg/L,检测限为3.86 ng/mL,在水、牛奶和鸡肉样品中的回收率为90.24–98.85%。该平台为样品中超灵敏、高选择性测定强力霉素提供了高度可行的方案,并为“三合一”检测方法的开发提供了新视角。
相关成果以 “ A magnetic-fluorescent integrated platform for three-in-one sensing of doxycycline in food with enhanced sensitivity and specificity” 为题发表在《Food Chemistry
全文速递河北农业大学胡雪莲&汤轶伟‖FoodChem.食品抗生素残留无处遁形新型磁-荧光三合一传感平台实现强力霉素高特异高灵敏检测.pdf

研究图/Introduction

Scheme 1Schematic illustration of the synthesis and application of Fe3O4-COOH@MIL-101(Cr)@MIPs and b-BCDs.

Fig. 1. SEM images of (A) Fe3O4-COOH, (B) Fe3O4-COOH@MIL-101(Cr), (C) Fe3O4-COOH@MIL-101(Cr)@MIPs and (E) Fe3O4-COOH@MIL-101(Cr)@NIPs. (D) The elemental mapping image of Fe3O4-COOH@MIL-101(Cr)@MIPs. TEM images of (F) Fe3O4-COOH@MIL-101(Cr), (G) Fe3O4-COOH@MIL-101(Cr)@MIPs and (H) Fe3O4-COOH@MIL-101(Cr)@NIPs. (I) FT-IR spectra of (a) Fe3O4, (b) Fe3O4-COOH, (c) Fe3O4-COOH@MIL-101(Cr), (d) Fe3O4-COOH@MIL-101(Cr)@MIPs and (e) Fe3O4-COOH@MIL-101(Cr)@NIPs. (J) Magnetization curves of Fe3O4-COOH, Fe3O4-COOH@MIL-101(Cr) and Fe3O4-COOH@MIL-101(Cr)@MIPs. (K) TGA curves of Fe3O4-COOH, Fe3O4-COOH@MIL-101(Cr), Fe3O4-COOH@MIL-101(Cr)@MIPs and Fe3O4-COOH@MIL-101(Cr)@NIPs. (L) N2 adsorption-desorption isotherms of Fe3O4-COOH, Fe3O4-COOH@MIL-101(Cr), and Fe3O4-COOH@MIL-101(Cr)@MIPs.

Fig. 2. (A) Adsorption isothermal curves of four adsorbents, (B) Langmuir simulation model of adsorption isotherms and (C) Freundlich simulation model of adsorption isotherms. (D) Adsorption kinetic curves of four adsorbents. (E) Pseudo-first-order kinetic model and (F) pseudo-second-order kinetic model fitting for Fe₃O₄-COOH@MIL-101(Cr)@MIPs and Fe₃O₄-COOH@MIPs; (G) Adsorption capacity of Fe3O4-COOH@MIL-101(Cr)@MIPs and Fe3O4-COOH@MIL-101(Cr)@NIPs for DOX and its analogues (H) Effect of coexisting interferents on the adsorption capacity of Fe3O4-COOH@MIL-101(Cr)@MIPs. (I) Reusability of Fe3O4-COOH@MIL-101(Cr)@MIPs.

Fig. 3. Optimization of (A) adsorption solvents, (B) adsorbent concentration and (C) adsorption time. Optimization of (D) volume ratio of methanol to acetic acid, (E) elution times, (F) elution volume and (J) elution time. (H) Effect of b-BCDs addition on the fluorescence response. (I) Fluorescence response of b-BCDs at different incubation times.
Fig. 4. (A) The combination of template molecule and functional monomer. (B) Frontier molecular orbital diagrams of MAA/DA-DOX. (C) The IGMH diagram of the MAA/DA-DOX system. (D) Mullikan atomic charge in MAA/DA-DOX system. (E) The electrostatic potential mappings of MAA/DA-DOX system.
Fig. 5. (A) UV–vis spectrum of DOX, excitation spectrum and emission spectrum of b-BCDs. (B) Fluorescence emission decay curves of b-BCDs and b-BCDs with DOX. (C) Observed and corrected quenching efficiency of DOX towards b-BCDs. (D) Fluorescence spectra of b-BCDs solution with different concentrations of DOX. (E) The linear calibration plots of b-BCDs.

结论 /Conclusion

总之,我们成功构建了一种新型的MSPE-FL传感平台,该平台集成了Fe₃O₄-COOH@MIL-101(Cr)@MIPs纳米吸附剂和b-BCDs探针,用于痕量强力霉素(DOX)的灵敏、快速分析。得益于Fe₃O₄、MIL-101(Cr)和MIPs各自固有优势的结合,所构建的Fe₃O₄-COOH@MIL-101(Cr)@MIPs不仅具有高吸附容量、优异的结合亲和力、良好的选择性、强大的抗干扰能力和令人满意的可重复使用性,而且能够实现对DOX的快速磁分离和高效富集。b-BCDs探针表现出明显的荧光猝灭响应,并能够在可接受的线性范围和灵敏度内检测DOX。在基于Fe₃O₄-COOH@MIL-101(Cr)@MIPs的样品前处理辅助下,b-BCDs作为信号转导子,成功用于食品样品中DOX的定量荧光检测,取得了满意的结果。综合考虑该多功能MSPE-FL传感平台的诸多优势,如制备简单、用户友好、分析速度快、选择性好、重现性优异以及成本效益高等,本工作不仅为高性能吸附剂和荧光探针的合理设计提供了一种有前景的方法,也为开发集提取、富集和检测于一体的“三合一”集成检测方法以实现污染物的准确、特异性测定提供了新的视角。尽管该MSPE-FL平台实现了对食品污染物的高效检测,但面对食品安全检测日益增长的需求,它仍然存在一定的局限性。复合材料的构建过程相对复杂,涉及多个步骤以及多种材料的精确组合,这在一定程度上限制了该平台的大规模应用。同时,所构建的平台荧光响应模式较为单一,在处理复杂样品或干扰物质时可能会影响检测的准确性和灵敏度。这些局限性指明了后续的研究方向,激励我们进一步探索和改进,以提升平台的性能和实用性。

文献直通车 /Literature information

A magnetic-fluorescent integrated platform for three-in-one sensing of doxycycline in food with enhanced sensitivity and specificityRuoyu Cao a,b, Ning Zhang a,b, Chang Lu a, Xuelian Hu a,*, Wenxiu Wang a, Tianyi Ma c, Shuo Wang d, Yiwei Tang a,b,**

原文链接:https://doi.org/10.1016/j.foodchem.2026.148706

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  1. CONNECT:[ UseTime:0.000630s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000874s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000329s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000297s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000463s ]
  6. SELECT * FROM `set` [ RunTime:0.000214s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000633s ]
  8. SELECT * FROM `article` WHERE `id` = 501966 LIMIT 1 [ RunTime:0.004988s ]
  9. UPDATE `article` SET `lasttime` = 1778628747 WHERE `id` = 501966 [ RunTime:0.010846s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000232s ]
  11. SELECT * FROM `article` WHERE `id` < 501966 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001715s ]
  12. SELECT * FROM `article` WHERE `id` > 501966 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000534s ]
  13. SELECT * FROM `article` WHERE `id` < 501966 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001717s ]
  14. SELECT * FROM `article` WHERE `id` < 501966 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.015318s ]
  15. SELECT * FROM `article` WHERE `id` < 501966 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000929s ]
0.110565s