Competitive fluorescence assay for specific recognition of atrazine by magnetic molecularly imprinted polymer based on Fe3O4-chitosan

文献类型: 外文期刊

第一作者: Liu, Guangyang

作者: Liu, Guangyang;Yang, Xin;Wang, Jing;Zhang, Min;Liu, Guangyang;Li, Tengfei;She, Yongxin;Wang, Miao;Wang, Jing;Wang, Shanshan;Jin, Fen;Jin, Maojun;Shao, Hua;Jiang, Zejun;Yu, Hailong

作者机构:

关键词: Fe3O4-chitosan nanoparticles;Magnetic molecularly imprinted polymers;Fluorescence assay;Atrazine

期刊名称:CARBOHYDRATE POLYMERS ( 影响因子:9.381; 五年影响因子:8.678 )

ISSN:

年卷期:

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收录情况: SCI

摘要: 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.

分类号: O629`Q53

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