孔雀绿
荧光
检出限
量子点
材料科学
RGB颜色模型
线性范围
分析化学(期刊)
猝灭(荧光)
碳纤维
光电子学
化学
色谱法
光学
物理
计算机科学
有机化学
复合数
吸附
复合材料
操作系统
作者
Xiaoyan Wang,Xiangfeng Luo,Pintian Zou,Yiju Lv,Xiangfei Kong,Yushu Huang,Zheng Liu,Guo‐Cheng Han
标识
DOI:10.1088/1361-6528/ad22ac
摘要
A visual detection method for malachite green (MG) in food was established based on "Double-response-OFF" ratiometric fluorescent paper-based sensor. Biomass carbon quantum dots (BCQDs) using broad bean shell, and Ti3C2MXene quantum (MQDs) dots modified by ethylenediamine were synthesized by solvothermal method. The MG and two kinds of quantum dots could undergo static quenching, and the fluorescence color of two kinds of quantum dots gradually changed from red to blue, eventually the fluorescence was quenched, and the pattern had a two-stage linear relationship using fluorescent spectrofluorometer in the range of 0.1-140.0 μM and the detection limit of 0.07 μM. On this basis, a Biomass/MXene quantum dots ratiometric fluorescence paper-based sensor was constructed and applied to fish sample. Through mobile phone software-Color recognizer, RGB values of fluorescent paper-based sensor at various concentrations of MG were extracted. The results showed that MG concentration was linearly correlated with R' value of RGB in the range of 20.0-140.0 μM with 16.5 μM detection limit. The method had been applied to the determination of canned fish and fresh basa fish samples, and the recovery rates were 97.33-108.93 % and 96.04-117.97 %, respectively. It proved that the ratiometric fluorescent paper-based sensor could be used for the rapid visual quantitative detecting MG in real samples.
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