School of Chemical and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin 132022, China.
Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science Technology, Qingdao 266042, China.
Food Chem. 2022 Oct 1;390:133156. doi: 10.1016/j.foodchem.2022.133156. Epub 2022 May 5.
N,S-GQDS was prepared through citric acid cracking method from thiourea and citric acid, a ratiometric fluorescence sensor was constructed for the detection of malachite green based on CdTe quantum dots and N,S-GQDs. Interestingly the color of this ratiometric fluorescence sensor could change from red to blue under UV light upon exposure to different amounts of malachite green, and this ratiometric fluorescence sensor could be used for visual detection of malachite green. Fluorescence emission spectra of this ratiometric fluorescence sensor with different amounts of malachite green were also analyzed, and there was a good linear relationship between F/F and concentrations of malachite green, the lowest limit detection could reach 0.4597 nmol/L. Furthermore, this proposed ratiometric sensor is used for quantitative analysis of malachite green in fish sample. Results shown that this ratiometric fluorescence sensor is feasibility and practicality for both visual detection and quantitative analysis of malachite green.
N，S-GQDS 通过柠檬酸裂解法由硫脲和柠檬酸制备，基于 CdTe 量子点和 N，S-GQDS 构建了比率荧光传感器，用于检测孔雀石绿。有趣的是，这种比率荧光传感器在暴露于不同量的孔雀石绿后，其颜色可以从红色变为蓝色，并且这种比率荧光传感器可以用于孔雀石绿的可视化检测。还分析了该比率荧光传感器在不同量的孔雀石绿下的荧光发射光谱，并且 F/F 与孔雀石绿的浓度之间存在良好的线性关系，最低检测限可达 0.4597 nmol/L。此外，该比率传感器用于鱼样中孔雀石绿的定量分析。结果表明，该比率荧光传感器可用于孔雀石绿的可视化检测和定量分析，具有可行性和实用性。
