光子上转换
荧光
费斯特共振能量转移
检出限
化学
迈克尔反应
光化学
共价键
丙烯酰胺
硫醇
色谱法
聚合物
催化作用
有机化学
物理
离子
量子力学
共聚物
作者
Yawen Rong,Shujat Ali,Qin Ouyang,Li Wang,Bing Wang,Quansheng Chen
出处
期刊:Food Chemistry
[Elsevier]
日期:2021-07-01
卷期号:351: 129215-129215
被引量:40
标识
DOI:10.1016/j.foodchem.2021.129215
摘要
This study describes a turn-on upconversion fluorescence sensor for the detection of acrylamide (AA) based on glutathione (GSH) modulated turn-on fluorescence strategy. Polyethyleneimine-modified upconversion nanoparticles were first prepared by the hydrothermal method and then Rhodamine B derivative (RBD) was loaded on their surface through non-covalent bonding. The GSH coupled with RBD and strongly quenched the upconversion fluorescence via fluorescence resonance energy transfer. Upon addition of tris (2-carboxyethyl) phosphine, the thiol-ene Michael addition reaction between GSH and AA was efficiently catalyzed, resulted in the quenched fluorescence triggered on. Under the optimum conditions, a linear detection range from 0.1 to 104 μM was implemented for AA with a limit of detection of 0.68 nM and great sensitivity was observed. Importantly, the proposed sensor was evaluated for spiked potato chips samples with a satisfactory result in contrast to high-performance liquid chromatography, confirmed its applicability for the rapid detection of AA.
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