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Molecularly imprinted optosensing material based on hydrophobic CdSe quantum dots via a reverse microemulsion for specific recognition of ractopamine.
- Source :
-
Biosensors & bioelectronics [Biosens Bioelectron] 2014 May 15; Vol. 55, pp. 127-32. Date of Electronic Publication: 2013 Dec 11. - Publication Year :
- 2014
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Abstract
- A novel molecularly imprinted polymer (MIP) based on hydrophobic CdSe quantum dots (QDs) was synthesized using a one-pot room-temperature reverse microemulsion polymerization, and this polymer was applied as a molecular recognition element to construct a ractopamine (RAC) optosensor. Here, hydrophobic CdSe QDs were first introduced to the hydrophilic analyte-imprinted polymer for highly selective and sensitive detection of RAC via the change in fluorescence intensity, because of the high-quality hydrophobic QDs with high quantum yield, sharp photoluminescence spectra and chemical and fluorescent stability. Under optimal conditions, the relative fluorescence intensity of MIP based on hydrophobic QDs decreased linearly with the increasing concentration of RAC in the range of 1.21 × 10(-9) -3.03 × 10(-6)mol L(-1) with a detection limit of 7.57 × 10(-10)mol L(-1), and the precision for five replicate detections of 1.51 × 10(-8)mol L(-1) RAC was 2.09% (relative standard deviation). The proposed method was successfully applied for the determination of trace RAC in pork samples, with good recoveries ranging from 82.79% to 97.23%.<br /> (© 2013 The Authors. Published by Elsevier B.V. All rights reserved.)
- Subjects :
- Animals
Emulsions chemistry
Food Analysis methods
Food Contamination analysis
Hydrophobic and Hydrophilic Interactions
Swine
Cadmium Compounds chemistry
Meat analysis
Molecular Imprinting methods
Phenethylamines analysis
Polymers chemistry
Quantum Dots
Selenium Compounds chemistry
Spectrometry, Fluorescence methods
Subjects
Details
- Language :
- English
- ISSN :
- 1873-4235
- Volume :
- 55
- Database :
- MEDLINE
- Journal :
- Biosensors & bioelectronics
- Publication Type :
- Academic Journal
- Accession number :
- 24370883
- Full Text :
- https://doi.org/10.1016/j.bios.2013.11.064