A paper-based ratiometric fluorescence sensor based on carbon dots modified with Eu 3+ for selective detection of tetracycline in seafood aquaculture water
A paper-based ratiometric fluorescence sensor based on carbon dots modified with Eu 3+ for selective detection of tetracycline in seafood aquaculture water
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DOI：
10.1039/d3an02133e
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发表时间：
2024
期刊：
影响因子：
--
通讯作者：
Liqiang Luo
中科院分区：
文献类型：
--
作者：
Jialu Zhang;Yuanyuan Chen;Ji Qi;Qinglan Miao;Dongmei Deng;Haibo He;Xiaoxia Yan;Liqiang Luo
The paper-based ratiometric fluorescence sensor is normally prepared by two or more types of fluorescent materials on .paper chip for simple, low-cost and fast detection. However, the choice of multi-step and one-step modification on paper .chip affects the analytical performance. Herein, a novel paper-based dual-emission ratiometric fluorescence sensor was .designed for the selective detection of tetracycline (TC). Carbon dots (CDs) modified with Eu.3+. were combined with a .sealed paper-based microfluidic chip by two methods, one-step grafting CDs-Eu.3+. on paper and step-by-step grafting CDs .and Eu.3+. on paper. The analytical performance was studied and optimized respectively. The red fluorescence of Eu.3+. at 450 .nm is enhanced and the blue fluorescence of CDs at 617 nm is quenched by energy transfer in the presence of TC. Under .optimal conditions, TC is selectively determined in the linear range from 0.1 μM to 100 μM with the detection limit of 0.03 .μM by the step-by-step grafting method. In addition, the sealed paper chip can effectively prevent the pollution and .volatilization from reagent. This technique has been used to analyze TC in seafood aquaculture water with satisfactory .results..
