Fluorescent Probes Based on Ag NPs@N/GQDs and Molecularly Imprinted Polymer for Sensitive Detection of Noradrenaline in Bananas
文献类型： 外文期刊
作者： Wang, Yaru 1 ; Li, Shuhuai 2 ; Ma, Xionghui 2 ; Pang, Chaohai 2 ; Wu, Yuwei 2 ; Wang, Mingyue 1 ; Li, Bei 3 ; Liu, Sixin 1 ;
作者机构： 1.Hainan Univ, Sch Food Sci & Engn, Haikou 570228, Peoples R China
2.Chinese Acad Trop Agr Sci, Anal & Test Ctr,Minist Agr & Rural Affairs, Hainan Prov Key Lab Qual & Safety Trop Fruits & Ve, Key Lab Qual & Safety Control Subtrop Fruits & Veg, Haikou 571101, Peoples R China
3.Hainan Inst Food Control, Key Lab Trop Fruits & Vegetables Qual & Safety Sta, Haikou 570314, Peoples R China
关键词： Fluorescent probe; Graphene quantum dots; Silver nanoparticles; Molecular imprinted polymer; Noradrenaline
期刊名称：JOURNAL OF FLUORESCENCE （ 影响因子：2.7； 五年影响因子：2.4 ）
ISSN： 1053-0509
年卷期： 2024 年
页码：
收录情况： SCI
摘要： Fluorescence intensity and selective recognition ability are crucial factors in determining the analytical techniques for fluorescent probes. In this study, a core-shell fluorescent material, composed of silver nanoparticles@nitrogen-doped graphene quantum dots (Ag NPs@N/GQDs), was synthesised using mango leaves as the raw material through a thermal cracking method, resulting in strong fluorescence luminescence intensity. By employing noradrenaline as a template molecule and using a surface molecular imprinting technique, a molecularly imprinted membrane (MIP) was formed on the surface of the fluorescent material, that was subsequently eluted to obtain a highly specific, fluorescent probe capable of recognising noradrenaline. The probe captured various concentrations of noradrenaline using the MIP, which decreased the fluorescence intensity. Then a method for detecting trace amounts of noradrenaline was established. This method exhibited a linear range from 0.5 -700 pM with a detection limit of 0.154 pM. The proposed method was implemented in banana samples. Satisfactory recoveries were confirmed at four different concentrations. The method presented a relative standard deviation (RSD) of less than 5.0%.
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