Silver ions involved fluorescence "on-off" responses of gold nanoclusters system for determination of carbendazim residues in fruit samples
文献类型： 外文期刊
作者： Guan, Mengting 1 ; Guo, Yue 1 ; Yan, Xiaoxia 1 ; Si, Xiaojing 2 ; Peng, Xitian 3 ; Lei, Yunyi 1 ; Shen, Xia 1 ; Luo, Liqiang 1 ; He, Haibo 1 ;
作者机构： 1.Shanghai Univ, Coll Sci, Dept Chem, Shanghai 200444, Peoples R China
2.Shanghai Business Sch, Dept Food Sci, Shanghai 200235, Peoples R China
3.Hubei Acad Agr Sci, Inst Agr Qual Stand & Testing Technol Res, Wuhan 430064, Peoples R China
关键词： Gold nanoclusters; Ag+; Carbendazim; Fluorescence "on-off"
期刊名称：FOOD CHEMISTRY （ 影响因子：9.231； 五年影响因子：8.795 ）
ISSN： 0308-8146
年卷期： 2022 年 386 卷
页码：
收录情况： SCI
摘要： Herein, a fluorescence "on-off " system was developed for monitoring carbendazim (CBZ) residues in fruit samples, based on glutathione-gold nanoclusters (GSH-Au NCs) and silver ions (Ag+). First, the fluorescence intensity of GSH-Au NCs was greatly enhanced (turn on) with aggregation-induced emission enhancement (AIEE) effect in the presence of Ag+, then fluorescence quenching occurred (turn off) with adding CBZ by the chelation between CBZ and Ag+. The quenching degree was well linearly dependent on CBZ concentration covering from 0.5 to 20 mu M. Moreover, the GSH-Au NCs-Ag+ system exhibited superior selectivity towards CBZ and was sensitive for the determination of CBZ in apple and orange juices with a low detection limit of 0.12 mu M. The recoveries of CBZ spiked in fruit samples ranged from 81.0 % to 111.4% with the relative standard deviations less than 6.6%, demonstrating its great potential for monitoring CBZ residues in fruit samples.
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