Journal
CARBOHYDRATE POLYMERS
Volume 137, Issue -, Pages 75-81Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2015.10.062
Keywords
Fe3O4-chitosan nanoparticles; Magnetic molecularly imprinted polymers; Fluorescence assay; Atrazine
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Funding
- National Natural Science Foundation of China [31171890]
- Special Fund for Agro-Scientific Research in the Public Interest [201209094]
- Introduction of International Advanced Agricultural Science and Technology Program ('948' plan) [2011-G5]
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A novel fluorescence sensing strategy for determination of atrazine in tap water involving direct competition between atrazine and 5-(4,6-dichlorotriazinyl) aminofluorescein (5-DTAF), and which exploits magnetic molecularly imprinted polymer (MMIP), has been developed. The MMIP, based on Fe3O4-chitosan nanoparticles, was synthesized to recognize specific binding sites of atrazine. The recognition capability and selectivity of the MMIP for atrazine and other triazine herbicides was investigated. Under optimal conditions, the competitive reaction between 5-DTAF and atrazine was performed to permit quantitation. Fluorescence intensity changes at 515 nm was linearly related to the logarithm of the atrazine concentration for the range 2.32-185.4 mu M. The detection limit for atrazine was 0.86 mu M (S/N = 3) and recoveries were 77.6-115% in spiked tap water samples. (C) 2015 Elsevier Ltd. All rights reserved.
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