1. FRET-based aptamer biosensor for selective and sensitive detection of aflatoxin B1 in peanut and rice.
- Author
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Sabet FS, Hosseini M, Khabbaz H, Dadmehr M, and Ganjali MR
- Subjects
- Aflatoxin B1 metabolism, Arachis growth & development, Fluorescence, Food Analysis, Gold chemistry, Limit of Detection, Metal Nanoparticles chemistry, Oryza growth & development, Aflatoxin B1 analysis, Aptamers, Nucleotide metabolism, Arachis metabolism, Biosensing Techniques methods, Fluorescence Resonance Energy Transfer methods, Oryza metabolism, Quantum Dots
- Abstract
Aflatoxins are potential food pollutants produced by fungi. Among them, Aflatoxin B1 (AFB1) is the most toxic. Therefore, a great deal of concern is associated with AFB1 toxicity. In this work, utilizing a FRET-based method, we have developed a nanobiosensor for detection of AFB1 in agricultural foods. Aptamer-conjugated Quantum dots (QDs) are adsorbed to Au nanoparticles (AuNPs) due to interaction of aptamers with AuNPs leading to quenching effect on QDs fluorescence. Upon the addition of AFB1, the specific aptamers are attracted to AFB1, getting distance from AuNPs which result in fluorescence recovery. Under optimized conditions the detection limit of proposed nanobiosensor was 3.4nM with linear range of 10-400nM. Selectivity test demonstrates that the nanobiosensor could be a promising tool for specific evaluation of food stuff. This method was successfully applied for the analysis of AFB1 in rice and peanut samples., (Copyright © 2016 Elsevier Ltd. All rights reserved.)
- Published
- 2017
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