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Highly selective fluorescence probe for imidacloprid measurement based on fluorescence resonance energy transfer

文献类型： 外文期刊

作者： Luo, Jinmei 1 ; Li, Shuhuai 2 ; Pang, Chaohai 2 ; Wang, Mingyue 2 ; Ma, Xionghui 2 ; Zhang, Chenghui 1 ;

作者机构： 1.Hainan Univ, Sch Food Sci & Engn, Haikou 570228, Hainan, Peoples R China

2.Chinese Acad Trop Agr Sci, Hainan Prov Key Lab Qual & Safety Trop Fruits & V, Anal & Test Ctr, Haikou 571101, Hainan, Peoples R China

关键词： Graphene quantum dot; Carbon quantum dot; Fluorescence resonance energy transfer; Quenching; Imidacloprid

期刊名称：MICROCHEMICAL JOURNAL （ 影响因子：5.304； 五年影响因子：4.723 ）

ISSN： 0026-265X

年卷期： 2022 年 175 卷

页码：

收录情况： SCI

摘要： Herein, a fluorescent probe was investigated for the detection of imidacloprid based on the fluorescence resonance energy transfer (FRET) between two carbon-based quantum dots, namely graphene- and carbon quantum dots (GQDs/C-dots). In an HAc-NaAc buffer solution at pH = 5.0, an effective FRET occurred between the GQDs and C-dots, significantly enhancing the C-dot fluorescence. When imidacloprid was added to the FRET system, the fluorescence intensity of the C-dots was quenched in a linear imidacloprid concentration-dependent manner, which allowed for the establishment of a new method for the determination of imidacloprid by GQD/C-dot FRET. Under optimised experimental conditions, the linear range of imidacloprid was 5-4000 x 10-9 mol L-1, with a correlation coefficient r and a detection limit of 0.998 and 8.23 x 10-10 mol L-1, respectively. This method was applied to the detection of imidacloprid residues in real samples, and a satisfactory recovery rate of standard additions was found between 93.0% and 105.6%.

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