Rapid detection of malachite green in fish based on CdTe quantum dots coated with molecularly imprinted silica.
Food Chem
; 229: 847-853, 2017 Aug 15.
Article
en En
| MEDLINE
| ID: mdl-28372253
ABSTRACT
A sensitive fluorescence sensor for the detection of malachite green (MG) was fabricated by grafting molecularly imprinted polymers (MIPs) onto the surface of CdTe quantum dots (QDs). The MIP-coated QDs were synthesized via a reverse microemulsion method using (3-aminopropyl)triethoxysilane (APTES) and tetraethyl orthosilicate (TEOS) as functional monomer and cross-linker, respectively. The optimum molar ratio of MG, functional monomer and cross-linker was 1310. The MIP-coated QDs exhibited uniform spheres with diameter around 49nm and excellent fluorescence emission at λex 370nm. A linear relationship with two segments between the relative fluorescence intensities and the MG concentrations ranging from 0.08 to 20µmol·L-1 could be obtained with a detection limit of 12µg·kg-1. The fluorescent probe was successfully applied to the determination of MG in fish samples with the spiked recoveries ranging from 94.3% to 109.5% which were in accordance with those of the measurement by HPLC-UV.
Palabras clave
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Colorantes de Rosanilina
/
Telurio
/
Contaminación de Alimentos
/
Dióxido de Silicio
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Compuestos de Cadmio
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Puntos Cuánticos
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Impresión Molecular
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
Food Chem
Año:
2017
Tipo del documento:
Article