Highly sensitive fluorescent quantification of carbendazim by two-dimensional Tb-MOF nanosheets for food safety.
Highly sensitive fluorescent quantification of carbendazim by two-dimensional Tb-MOF nanosheets for food safety.
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DOI：
10.1016/j.foodchem.2023.135853
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发表时间：
2023-03
期刊：
影响因子：
8.8
通讯作者：
Ting Wang;Lei Zhang;Jieyuan Zhang;Gaoxian Guo;Xin-hui Jiang;Zhengwei Zhang;Siqiao Li
中科院分区：
文献类型：
--
作者：
Ting Wang;Lei Zhang;Jieyuan Zhang;Gaoxian Guo;Xin-hui Jiang;Zhengwei Zhang;Siqiao Li
多菌灵(CBZ)是一种著名的苯并咪唑类农药，在农业上用于防治由真菌引起的植物病害。食品中残留的CBZ对人类健康构成严重威胁。为此，研制了一种用于CBZ快速、超灵敏检测的二维Tb基金属有机骨架(2DTb-MOF)纳米片荧光传感器。以Tb3+离子和5-硼-1，3-苯二甲酸(BBDC)为前驱体制备的2DTb-MOF纳米片具有良好的光学性能。加入CBZ后，Tb-MOF纳米片的荧光由于内滤波效应和动态猝灭而被猝灭。该荧光传感器提供0.06-4和4-40微克/毫升两个线性范围，低检出限为17.95微克/毫升。此外，该传感平台已成功应用于苹果和茶叶中CBZ的检测，获得了满意的结果。本研究为CBZ的定性和定量检测提供了一种有效的替代策略，以确保食品安全。
Carbendazim (CBZ), a well-known benzimidazole pesticide, is utilized in agriculture to prevent and cure plant diseases caused by fungi. Residual CBZ in food poses serious threat to human health. Herein, a fluorescent two-dimensional terbium-based metal–organic framework (2D Tb-MOF) nanosheet sensor was developed for the rapid and ultrasensitive detection of CBZ. The 2D Tb-MOF nanosheets, prepared with Tb3+ions and 5-borono-1,3-benzenedicarboxylic acid (BBDC) as the precursors, exhibited excellent optical properties. Upon the addition of CBZ, the fluorescence of Tb-MOF nanosheets was quenched because of the inner filter effect (IFE) and dynamic quenching. The fluorescence sensor offered two linear ranges of 0.06–4 and 4–40 µg/mL with a low detection limit of 17.95 ng/mL. Furthermore, the proposed sensing platform was successfully applied to assay CBZ in apples and tea, and satisfactory results were obtained. This study provides an effective alternative strategy for the qualitative and quantitative determination of CBZ to ensure food safety.