荧光
检出限
水溶液
猝灭(荧光)
分析化学(期刊)
量子点
硅
线性范围
再现性
化学
材料科学
选择性
纳米技术
色谱法
光电子学
有机化学
光学
物理
催化作用
作者
Z S Liu,Jingzhou Hou,Xianfeng Wang,Changjun Hou,Zhong Ji,Jin‐Ming Lin,Danqun Huo
标识
DOI:10.1016/j.saa.2020.118463
摘要
A novel rapid and sensitive fluorescence probe based on silicon quantum dots (Si QDs) fluorescence was fabricated for selective detection of tetracyclines (TCs) residues. Si QDs were innovatively prepared via facile One-Pot Solvent-Free Method and characterized by TEM, FT-IR, UV absorption, fluorescence, XPS and XRD. In aqueous solution, Cu2+ and Si QDs complexed together and the fluorescence of Si QDs quenched (static quenching) to a certain extent. TCs can be early in binding to Cu2+ and prevent Si QDs fluorescence quenching. As a consequence, quantitative screening of TCs can be achieved. The assay is highly selective for TCs. Represented by chlortetracycline (CTC), a member of TCs, under optimized conditions, good linear relationship in the range of 11.32–1086.72 nM was obtained, and the detection limit (LOD; S/N ratio = 3) of this assay for CTC is 0.92 nM. It was successfully applied to the determination of CTC in spiked bee honey and total TCs in actual honey samples. And the evaluation of selectivity, reproducibility and stability of the probe were favorable. These results demonstrated that the presented fluorescent probe can be a promising sensing platform for TCs analysis.
科研通智能强力驱动
Strongly Powered by AbleSci AI