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Reference type: Journal
Authors: Wu L, Lin ZZ, Zeng J, Zhong HP, Chen XM, Huang ZY
Article Title: Detection of malachite green in fish based on magnetic fluorescent probe of CdTe QDs/nano-Fe3O4@MIPs.
Publication date: 2018
Journal: Spectrochimica Acta Part A-Molecular and Biomolecular Spctroscopy
Volume: 196
Page numbers: 117-122.
DOI: 10.1016/j.saa.2018.02.016
Alternative URL: http://www.sciencedirect.com/science/article/pii/S1386142518301276

Abstract: A magnetic fluorescent probe of CdTe QDs/nano-Fe3O4@MIPs was prepared using CdTe QDs and Fe3O4 nanoparticles as co-nucleus and molecularly imprinted polymers (MIPs) as specific recognition sites based on a reverse microemulsion method. With the specific enrichment and magnetic separation properties, the probe of CdTe QDs/nano-Fe3O4@MIPs was used to detect malachite green (MG) in fish samples. The TEM analysis showed that the particles of CdTe QDs/nano-Fe3O4@MIPs were spherical with average diameter around 53nm, and a core-shell structure was well-shaped with several Fe3O4 nanoparticles and CdTe QDs embedded in each of the microsphere. Quick separation of the probes from solutions could be realized with a magnet, indicating the excellent magnetic property of CdTe QDs/nano-Fe3O4@MIPs. The probe exhibited high specific adsorption towards MG and excellent fluorescence emission at λem 598nm. The fluorescence of CdTe QDs/nano-Fe3O4@MIPs could be linearly quenched by MG at the concentrations from 0.025 to 1.5 μmol L-1. The detection limit was 0.014μmol L-1. The average recovery of spiked MG in fish samples was 105.2%. The result demonstrated that the as-prepared CdTe QDs/nano-Fe3O4@MIPs could be used as a probe to the detection of trace MG in fish samples
Template and target information: malachite green, MG
Author keywords: Magnetic fluorescent probe, Molecularly imprinted polymers, CdTe Quantum dots, Malachite green, Fish


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