A dual-response ratiometric fluorescent sensor for oxytetracycline determination in milk and mutton samples.
Talanta
; 277: 126382, 2024 Sep 01.
Article
em En
| MEDLINE
| ID: mdl-38852347
ABSTRACT
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.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Oxitetraciclina
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Espectrometria de Fluorescência
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Pontos Quânticos
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Leite
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Európio
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Corantes Fluorescentes
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Molibdênio
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article