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Reference type: Journal
Authors: Yang J, Lin ZZ, Nur AZ, Lu Y, Wu MH, Zeng J, Chen XM, Huang ZY
Article Title: Detection of trace tetracycline in fish via synchronous fluorescence quenching with carbon quantum dots coated with molecularly imprinted silica.
Publication date: 2018
Journal: Spectrochimica Acta Part A-Molecular and Biomolecular Spctroscopy
Volume: 190
Page numbers: 450-456.
DOI: 10.1016/j.saa.2017.09.066
Alternative URL: http://www.sciencedirect.com/science/article/pii/S138614251730793X

Abstract: A novel fluorescence-based sensor combining synchronous fluorescence spectroscopy (SFS) with molecularly imprinted polymers (MIPs) was fabricated with reverse microemulsion method. Tetracycline (TC), (3-aminopropyl) triethoxysilane (APTES), tetraethyl orthosilicate (TEOS) and carbon quantum dots (CDs) were used as template, functional monomer, cross-linker and signal sources respectively in the probe preparation. A synchronous fluorescence emission (λem) at 355nm was observed for the prepared MIP-coated CDs (MIP@CDs) particles when the wavelength interval (Δ λ) was set as 70nm, and the synchronous fluorescence intensity could be rapidly and efficiently quenched by TC based on inner filter effect (IFE). The quenching efficiencies of synchronous fluorescence intensity was linearly fitted with tetracycline (TC) concentrations ranging from 0.1 to 50 μmol L-1 with a detection limit (DL) of 9nmol L-1 (3σ, n = 9). The MIP@CDs was used as a probe to detect TC in fish samples with the recoveries ranging from 98.4% to 103.1% and the relative standard deviation less than 6.0%. The results illustrated that the as-prepared MIP@CDs could be applied to the detection of trace TC in fish samples with rapidity, high sensitivity and accuracy
Template and target information: tetracycline, TC
Author keywords: Carbon dots, Synchronous fluorescence spectroscopy, Molecularly imprinted polymers, Inner filter effect, Tetracycline, Fish

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