A ratiometric fluorescent sensor for tetracyclines detection in meat based on pH-dependence of targets with lanthanum-doped carbon dots as probes

Although some ratiometric fluorescent sensors have been reported to detect tetracyclines, most of ratiometric fluorescent sensors were established based on europium ion with a narrow linear range. In this work, a ratiometric fluorescent sensor for tetracyclines detection was established based on the...

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Veröffentlicht in:Analytical and bioanalytical chemistry 2022-03, Vol.414 (8), p.2597-2606
Hauptverfasser: Fan, Ya Jie, Su, Ming, Shi, Yu-E., Liu, Xiao Tong, Shen, Shi Gang, Dong, Jiang Xue
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container_issue 8
container_start_page 2597
container_title Analytical and bioanalytical chemistry
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creator Fan, Ya Jie
Su, Ming
Shi, Yu-E.
Liu, Xiao Tong
Shen, Shi Gang
Dong, Jiang Xue
description Although some ratiometric fluorescent sensors have been reported to detect tetracyclines, most of ratiometric fluorescent sensors were established based on europium ion with a narrow linear range. In this work, a ratiometric fluorescent sensor for tetracyclines detection was established based on the dual-emission lanthanum-doped carbon dots (La-CDs) as probes combining with the characteristic pH-response of tetracyclines. The fluorescence intensity of tetracyclines will be enhanced in high pH, and the emission peak of tetracyclines overlapped with the peak of probes. The superposition effect of tetracyclines and probes at 515 nm greatly improved the sensitivity of the ratiometric fluorescent sensor and widened the detection range, and linear ranges for oxytetracycline (OTC) and tetracycline (TC) were respectively 0.00–805.20 μM and 0.00–1039.50 μM. Moreover, the preparation procedure of the La-CDs was simple and time saving and the coupling agent was not required. A comparison of La-CDs with undoped carbon dots (un-CDs) showed that the optical performance and sensing performance of La-CDs were improved. In addition, a portable paper sensor with La-CDs as probes was preliminarily explored in this work, and the sensor has been applied to detect OTC and TC in pork and fish with satisfactory results. Graphical abstract
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In this work, a ratiometric fluorescent sensor for tetracyclines detection was established based on the dual-emission lanthanum-doped carbon dots (La-CDs) as probes combining with the characteristic pH-response of tetracyclines. The fluorescence intensity of tetracyclines will be enhanced in high pH, and the emission peak of tetracyclines overlapped with the peak of probes. The superposition effect of tetracyclines and probes at 515 nm greatly improved the sensitivity of the ratiometric fluorescent sensor and widened the detection range, and linear ranges for oxytetracycline (OTC) and tetracycline (TC) were respectively 0.00–805.20 μM and 0.00–1039.50 μM. Moreover, the preparation procedure of the La-CDs was simple and time saving and the coupling agent was not required. A comparison of La-CDs with undoped carbon dots (un-CDs) showed that the optical performance and sensing performance of La-CDs were improved. In addition, a portable paper sensor with La-CDs as probes was preliminarily explored in this work, and the sensor has been applied to detect OTC and TC in pork and fish with satisfactory results. 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In addition, a portable paper sensor with La-CDs as probes was preliminarily explored in this work, and the sensor has been applied to detect OTC and TC in pork and fish with satisfactory results. Graphical abstract</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><pmid>35166867</pmid><doi>10.1007/s00216-022-03895-x</doi><tpages>10</tpages></addata></record>
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subjects Analysis
Analytical Chemistry
Animals
Antibiotics
Biochemistry
Carbon
Carbon compounds
Carbon dots
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Coupling agents
Emission
Emissions
Europium
Fluorescence
Fluorescence in situ hybridization
Fluorescent Dyes
Food Science
Hydrogen-Ion Concentration
Laboratory Medicine
Lanthanum
Meat
Methods
Monitoring/Environmental Analysis
Oxytetracycline
pH effects
Pork
Probes
Quantum Dots
Research Paper
Sensors
Tetracycline
Tetracyclines
title A ratiometric fluorescent sensor for tetracyclines detection in meat based on pH-dependence of targets with lanthanum-doped carbon dots as probes
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