Journal
TALANTA
Volume 192, Issue -, Pages 295-300Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2018.09.060
Keywords
Organophosphate pesticide; Fluorescence resonance energy transfer; Cyclodextrin; Fluorescent probe; Fast testing
Categories
Funding
- National Natural Science Foundation of China [31501571, 31772071]
- Agriculture Research System of China [CARS-05-05A-03]
- Guangxi Innovation-driven Development Project [AA17204043-2]
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Here, we developed a novel non-enzymatic rapid testing method for determination of organophosphate pesticide (malathion) in water. In principle, target molecule can block the Fluorescence resonance energy transfer (FRET) between chemical fluorescent probe (energy donor) and beta-cyclodextrin-coated silver nanoparticles (@AgNP) (receptor). The effects of malathion on the dynamics of fluorescent probe and beta-cyclodextrin@AgNP were evaluated and their properties were further characterized. The current methodology showed a good sensitivity of 0.01 mu g/mL represented as a limit of detection (LOD) and the calibration curve was linear over the concentration range of 0.1-25 mu g/mL. Recovery rate from water samples spiked at 3 different concentration levels (0.3, 0.4, and 0.6 mu g/mL) showed satisfactory range between 83% and 101%.
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