A smartphone-integrated ratiometric fluorescent sensor for ascorbic acid determination using microplasma-enabled carbon dots and rhodamine B

被引:9
作者
Zhao, Yilan [1 ]
Jiang, Xue [1 ]
Huang, Ke [1 ]
Xiong, Xiaoli [1 ]
Yang, Qing [1 ]
机构
[1] Sichuan Normal Univ, Coll Chem & Mat Sci, Chengdu 610068, Sichuan, Peoples R China
基金
中国国家自然科学基金;
关键词
Carbon dots; Microplasma; Ratiometric fluorescence; Smartphone platform; Ascorbic acid; QUANTUM DOTS; PHOTOLUMINESCENCE; LIQUID; PROBE;
D O I
10.1016/j.foodchem.2024.141280
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
A switchable ratiometric fluorescent smartphone-assisted sensing platform based on nitrogen-doped carbon dots (N-CDs) and Rhodamine B was fabricated for the determination of the ascorbic acid (AA) content in fruits by quenching the fluorescence of N-CDs with Hg2+ (turn-off) and recovering with AA (turn-on). The blue-emission N-CDs was synthesized by liquid dielectric barrier discharge microplasma with an average size of 3.65 nm and an absolute quantum yield of 18 % (excited at 345 nm). In addition, the fluorescence color was converted to RGB values, enabling visual and quantitative determination of AA. Under optimal parameters, the linear ranges for detecting AA were found to be 3-170 mu M and 5-170 mu M for fluorescence spectrometer and smartphone sensing platform. The detection limits were 0.98 mu M and 2.90 mu M, respectively. Furthermore, the satisfactory recoveries in fruits were obtained by RF probe and smartphone platform. This smartphone-assisted platform will facilitate sensitive and visual determination for AA.
引用
收藏
页数:9
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