期刊
FOOD CHEMISTRY
卷 378, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2022.132076
关键词
Cadmium telluride quantum dots; Dual-signal fluorescence; Molybdenum disulfide quantum dots; Tetracycline
资金
- Project of Faculty of Agricultural Equipment, Jiangsu University [NZXB20200212]
- National Natural Science Foundation of China [31772073, 60901079]
- Natural Science Foundation of Jiangsu Province [BE2019359]
- Jiangsu Specially-Appointed Professor Project [20TPJS002]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
A dual-signal fluorescent sensor was developed for the detection of tetracycline in milk, showing excellent reproducibility and stability. The sensor utilized two types of quantum dots, MoS2 QDs and CdTe QDs, to achieve two fluorescence emission peaks at 433 nm and 573 nm. The sensor demonstrated strong application potential with accurate detection of TET concentration in milk samples.
A dual-signal fluorescent sensor was developed for tetracycline (TET) detection in milk with excellent reproducibility and stability. In this protocol, molybdenum disulfide quantum dots (MoS2 QDs) with blue fluorescence and cadmium telluride quantum dots (CdTe QDs) with yellow fluorescence were synthesized to establish the MoS2/CdTe-based sensor with two fluorescence emission peaks at 433 nm and 573 nm. With the addition of TET, the fluorescence of MoS2/CdTe were quenched by photoinduced electron transfer (PET), and the fluorescence of CdTe QDs were quenched more obvious than MoS2 QDs. With the strategy, a calibration curve was established between the TET concentration in the range of 0.1-1 mu M and the ratio of fluorescence intensity at 573 nm and 433 nm (F573/F433). Furthermore, the dual-signal sensor was applied for TET detection in milk samples with the recovery of 95.53-104.22% and the relative standard deviation (RSD) less than 5%, indicating the strong application potential.
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