Highly Sensitive Detection of Tetracyclines Residues in Honey by Mn-doped ZnS Quantum Dots Phosphorescent Probe

被引：0
|
作者：
Liu Z.-P. [1 ]
Jiang R. [1 ]
Pang K.-J. [1 ]
机构：
[1] Chongqing Vocational Institute of Safety & Technology, Chongqing
来源：
Liu, Zhen-Ping (nping305@126.com) | 1600年 / Editorial Office of Chinese Optics卷 / 41期
关键词：
Doxycycline; Honey; Mn-doped ZnS quantum dots; Phosphorescence probe; Tetracyclines;
D O I：
10.3788/fgxb20204102.0208
中图分类号：
学科分类号：
摘要：
L-cysteine modified Mn-doped ZnS quantum dots (Mn:ZnS QDs) were synthesized by hydration. A rapid and highly sensitive method for the determination of tetracyclines (TCs) residues in honey was established by using the internal filtration effect of TCs on Mn:ZnS QDs excited by phosphorescence. TCs have a strong ultraviolet absorption at the optimal phosphorescence excitation wavelength 289 nm of Mn:ZnS QDs. When TCs is present in the Mn:ZnS QDs solution, the excitation wavelength is absorbed by TCs to a certain extent, and the phosphorescence signal decreased. To be represented by doxycycline (DTC), the linear relationship between Mn:ZnS QDs phosphorescence signal and DTC concentration was established, and the quantitative detection of DTC was realized. Under the optimized conditions, the phosphorescence intensity decreased with the increase of DTC concentration and the relative phosphorescence intensity change ln(P0/P) showed a good linear relationship with the increase of DTC in the range from 0.05 to 150 μmol•L-1. The regression equation was lnP0/P=0.01758C(DTC)+0.01351(R2=0.999), the detection limit is 0.009 7 μmol•L-1. The actual sample honey was tested, the recovery rate was 92.4%~110%. The Mn:ZnS QDs phosphorescence probe developed in this study has good repeatability and stability for the detection of TCs residues. It can be used for the rapid and highly sensitive detection of TCs residues in honey. © 2020, Science Press. All right reserved.
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页码：208 / 216
页数：8
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