Preparation of CQDs/Eu3+ Ratiometric Fluorescent Probe for Visual Detection of Tetracycline

被引：0

作者：

Zheng J. ^{[1
]}

Zhou Y. ^{[1
]}

Cheng K. ^{[1
]}

机构：

[1] School of Materials Science and Engineering, Chang'an University, Xi'an

来源：

Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2022年 / 50卷 / 03期

关键词：

Carbon quantum dots; Europium ions; Ratiometric fluorescent ptobe; Tetracyclines;

D O I：

10.14062/j.issn.0454-5648.20210567

中图分类号：

学科分类号：

摘要：

A ratiometric fluorescent probe was constructed with carbon quantum dots (CQDs) and europium ions (Eu3+) as a fluorophore for the visual detection of teracycline (TC). In this ratiometric probe, CQDs/Eu3+ has an intense blue fluorescence peak at 439 nm and a weak red fluorescence peak at 616 nm under the excitation of 380 nm wavelength. The fluorescence peak intensity of CQDs at 439 nm gradually decreases based on the inner filter effect. The fluorescence intensity of Eu3+ at 616 nm increases due to an antenna effect with the addition of TC. The experimental factors, such as CQDs and Eu3+ ratio, response time, stability, etc., were optimized. The results show that the ratio fluorescent probe has a specific recognition ability for TC. A linear relationship between the fluorescence intensity ratio(F616/F439) and different concentrations of TC (0-50 μM) was established with a detection limit of 0.68 µM. With the addition of TC, the color of the ratio fluorescent probe solution under ultraviolet light gradually changes from blue to red and is used for the detection of TC in milk with the recoveries ranging from 92.5% to 1 14.8%. In addition, a TC test paper was also prepared, which can be quickly used for a visual test paper detection of TC. © 2022, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.

引用

页码：812 / 818

页数：6

共 24 条

[11] HOFF R, RIBARCKI F, ZANCANARO I, Et al., Bioactivity-based screening methods for antibiotics residues: a comparative study of commercial and in-house developed kits, Food Addit Contam A, 29, 4, pp. 577-586, (2012)
[12] AGA D S, GOLDFISH R, KULSHRESTHA P., Application of ELISA in determining the fate of tetracyclines in land-applied livestock wastes, Analyst, 128, 6, pp. 658-662, (2003)
[13] NAIK L, SHARMA R, MANN B, Et al., Rapid screening test for detection of oxytetracycline residues in milk using lateral flow assay, Food Chem, 219, pp. 85-92, (2017)
[14] HU Jing, YANG Xiaofeng, PENG Qianqian, Et al., A highly sensitive visual sensor for tetracycline in food samples by a double-signal response fluorescent nanohybrid, Food Control, (2020)
[15] TANG M, LIU X, ZHANG N, Et al., Synthesis of nitrogen and sulfur codoped carbon dots and application for fluorescence detection of Cd(II) in real water samples, Analyti Methods, 11, 40, pp. 5214-5221, (2019)
[16] TU Y, CHEN X, XIANG Y, Et al., Hydrothermal synthesis of a novel mesoporous silica fluorescence carbon dots and application in Cr(VI) and folic acid detection, Nano, 15, 7, (2020)
[17] CASTRO R C, SOARES J X, RIBEIRO D S M, Et al., Dual-emission ratiometric probe combining carbon dots and CdTe quantum dots for fluorometric and visual determination of H2O2, Sens Actuat B: Chemi, (2019)
[18] LIU X, WANG T, WANG W, Et al., A tailored molecular imprinting ratiometric fluorescent sensor based on red/blue carbon dots for ultrasensitive tetracycline detection, J Ind Eng Chem, 72, pp. 100-106, (2019)
[19] PENG Xiao, Design of ratiometric fluorescent probes and its application in the detection of small biological molecules, (2018)
[20] CASTRO R C, SOARES J X, RIBEIRO D S M, Et al., Dual-emission ratiometric probe [combining carbon dots and CdTe quantum dots for fluorometric and visual determination of H2O2, Sens Actuat B: Chem, (2019)

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