检出限
荧光
双金属片
四环素
化学
猝灭(荧光)
发光
适体
线性范围
色谱法
材料科学
抗生素
光电子学
催化作用
遗传学
生物化学
量子力学
生物
物理
作者
Lei Zhang,Yuehui He,Yue Wu,Jieyuan Zhang,Siqiao Li,Zhengwei Zhang
出处
期刊:Food Chemistry
[Elsevier]
日期:2024-03-01
卷期号:436: 137717-137717
被引量:1
标识
DOI:10.1016/j.foodchem.2023.137717
摘要
The development of a simple, rapid, and sensitive method for monitoring antibiotic residues is crucial for maintaining food safety. Herein, a ratiometric fluorescence probe based on bimetallic organic framework (Eu/Zr-MOF) was developed for the detection of tetracycline (TC). The Eu/Zr-MOF was synthesized by the coordination of Eu3+ and Zr4+ with 2-APDC, which exhibited a grape-like cluster morphology and dual-emitting fluorescence at 430 nm/616 nm. Based on the internal filtering effect (IFE), significant fluorescence quenching was observed at 430 nm, whereas only slight changes occurred at 616 nm. The ratiometric sensing offered two broad linear ranges (0.5-8 μg/mL; 10-60 μg/mL) and a low detection limit (26.7 ng/mL). The proposed method was applied to the determination of TC in pork and water samples. Fluorescent sensors have the advantages of simple design, fast response, and high sensitivity, thus providing a promising means for evaluating the safety of food contaminated with TC.
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