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Efficient fabrication of ratiometric fluorescence imprinting sensors based on organic-inorganic composite materials and highly sensitive detection of oxytetracycline in milk.
- Source :
-
Microchemical Journal . Sep2020, Vol. 157, pN.PAG-N.PAG. 1p. - Publication Year :
- 2020
-
Abstract
- • Specific sensors with tailor-made selective recognition sites to OTC were developed. • Ratiometric fluorescence sensors were successfully employed to detect OTC in milk. • The detection limit of the prepared fluorescence sensors was low to 3.5 nM. Ratiometric fluorescence imprinting sensors (GQDs/CdTe@MIPs) were successfully constructed by precipitation polymerization method for the recognition and detection of oxytetracycline (OTC) in milk samples. GQDs/CdTe@MIPs were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), fourier transform infrared (FT-IR), thermal gravity analysis (TGA), UV–visible spectroscopy (UV–vis) and X-ray photoelectron spectroscopy (XPS) techniques. A satisfying linear relationship under 0–80 μM OTC concentration (R2 = 0.99699) was exhibited. High sensitivity was showed with the limit of detection of 3.5 nM and high recovery ranged from 99.93% to 100.20%. In addition, the selectivity of GQDs/CdTe@MIPs to OTC was well comparing with other antibiotics. With the injection of different concentrations of OTC, the fluorescent color change of GQDs/CdTe@MIPs under the 365 nm UV lamp further verified that GQDs/CdTe@MIPs were used successfully for the visual detection to OTC in milk samples. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0026265X
- Volume :
- 157
- Database :
- Academic Search Index
- Journal :
- Microchemical Journal
- Publication Type :
- Academic Journal
- Accession number :
- 145118150
- Full Text :
- https://doi.org/10.1016/j.microc.2020.105053