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Sensitive detection of pesticides by a highly luminescent metal-organic framework

文献类型： 外文期刊

作者： Xu, Xiahong 1 ; Guo, Yuna 1 ; Wang, Xiangyun 1 ; Li, Wang 2 ; Qi, Peipei 1 ; Wang, Zhiwei 1 ; Wang, Xinquan 1 ; Gunasekar 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, State Key Lab Breeding Base Zhejiang Sustainable, Inst Qual & Stand Agroprod, Hangzhou 310021, Zhejiang, Peoples R China

2.Cent Sout

关键词： Metal-organic frameworks (MOFs); Fluorescence; Pesticides detection; Sensor; Rapid detection

期刊名称：SENSORS AND ACTUATORS B-CHEMICAL （ 影响因子：7.46； 五年影响因子：6.743 ）

ISSN： 0925-4005

年卷期： 2018 年 260 卷

页码：

收录情况： SCI

摘要： This work reports a highly luminescent metal-organic framework (MOF) with high surface area of 4073.9 m(2) g(-1), exhibiting an excellent adsorption ability and sensing performance in rapidly detecting parathion-methyl. This is an excellent example of luminescent MOFs to sensitively detect pesticides by fluorescent quenching with satisfactory results. This sensor provides a very wide linear detection range from 1.0 mu g kg(-1) to 10 mg kg(-1), and low limit of detection 0.12 mu g kg(-1) (0.456 nM) for parathion-methyl. This low detection limit is much lower than the maximum residue limits (MRL) in the European Union pesticides database (0.01 mg kg(-1) for fruits and vegetables, 0.02 mg kg(-1) for tree nuts), as well as those of previous assays. The quenching effect of parathion-methyl is attributed to the electron-rich chemical group of nitroaromatics which might lead to photo-induced electron transfer. The fluorescent method has been reliably used for the determination of parathion-methyl in spiked irrigation water with satisfactory results, which suggests its potential for rapid detection of pesticides in food and environmental sample. (c) 2018 Elsevier B.V. All rights reserved.

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