化学
纳米颗粒
荧光
光化学
猝灭(荧光)
无机化学
核化学
材料科学
纳米技术
光学
物理
作者
Shiqi Guo,Yilin Chai,Yongjun Wu,Hongchao Guo,Fei Yu,Lie Liu,Leiliang He,Songcheng Yu,Ye Tian,Jia Wang,Ruirui Yang,Ningge Jian,Yilin Wang
出处
期刊:Methods and Applications in Fluorescence
[IOP Publishing]
日期:2023-04-13
卷期号:11 (3): 035001-035001
被引量:2
标识
DOI:10.1088/2050-6120/acca61
摘要
In recent years, tetracyclines (TCs) is a hot research topic. Herein, we report an interesting discovery using the complexation of oxytetracycline and metal ions. In this study, according to the properties of Fe3O4nanoparticles (Fe3O4NPs) as a nanoenzyme, it can be used to catalyze the oxidation of KI by H2O2to produceI3-,while at the same timeI3-binds to rhodamine 6G (Rh6G) to form a conjoined particle (Rh6G ∼ I3)n, leading to a decrease in the fluorescence intensity of Rh6G. However, in the presence of TCs, Fe3O4NPs have a synergistic effect with TCs, leading to enhanced catalytic activity, as well as better selectivity compared to the activity of other reducing enzymes. Consequently,the fluorescent signal based on a resonance scattering effect between Rh6G andI3-is dependent on the concentration of TCs, thus achieving highly facile and robust detection of TCs. The limits of detection (LOD) of the method were 20 nM, 10 nM and 40 nM for oxytetracycline(OTC), tetracycline(TC) and chlortetracycline(CTC), respectively. Most importantly, the method can be successfully applied to the detection of TCs in milk, eggs, and honey. The recoveries of spiked samples ranged from 83.11 to 118.95%. Thus, a stable, hands-on strategy for the detection of TCs is proposed, which has potential applications in the field of food safety and environmental protection.
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