Details

Autor(en) / Beteiligte

• Guo, Mengjia
• Bi, Ming
• Zhang, Fangmei
• Ye, Xiwen
• Ma, Pinyi
• Gao, Dejiang
• Song, Daqian

Titel

A dual-response ratiometric fluorescent sensor for oxytetracycline determination in milk and mutton samples

Ist Teil von

• Talanta (Oxford), 2024-09, Vol.277, p.126382, Article 126382

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2024

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• Owing to the adverse effects of oxytetracycline (OTC) residues on human health, it is of great importance to construct a rapid and effective strategy for OTC detection. Herein, we developed a dual-response fluorescence sensing platform based on molybdenum sulfide quantum dots (MoS2 QDs) and europium ions (Eu3+) for ratiometric detection of OTC. The MoS2 QDs, synthesized through an uncomplicated one-step hydrothermal approach, upon OTC integration into the MoS2 QDs/Eu3+ sensing system, exhibit a significant quenching of blue fluorescence due to the inner filter effect (IFE), simultaneously enhancing the distinct red emission of Eu3+ at 624 nm, a phenomenon attributed to the antenna effect (AE). This sensor demonstrates exceptional selectivity and sensitivity towards OTC, characterized by a linear detection range of 0.2–10 μM and a notably low detection limit of 2.21 nM. Furthermore, we achieved a visual semi-quantitative assessment of OTC through the discernible fluorescence color transition from blue to red under a 365 nm ultraviolet lamp. The practical applicability of this sensor was validated through the successful detection of OTC in milk and mutton samples, underscoring its potential as a robust tool for OTC monitoring in foodstuffs to safeguard food safety. [Display omitted] •Dual-response fluorescence sensor was constructed by simply mixing MoS2 QDs and Eu3+ for the ratiometric detection of OTC.•The sensor was constructed without complex processing and can rapidly respond to OTC within 80 s.•Visual semi-quantitative detection of OTC can be achieved by distinguishing the fluorescence variation with the naked eye.•The sensor has high sensitivity to OTC with a LOD of 2.21 nM and has been used to detect OTC in milk and mutton samples.