荧光
检出限
MATLAB语言
线性范围
化学
计算机科学
纳米团簇
信号(编程语言)
四环素
分析化学(期刊)
生物系统
色谱法
材料科学
纳米技术
光学
物理
生物化学
抗生素
生物
程序设计语言
操作系统
作者
Ruimei Zhang,Yuxin Guo,Jiawei Huang,Hongchang Li,Rong Wen,Wenlei Wang
标识
DOI:10.1016/j.snb.2023.134892
摘要
Tetracycline (TC) is a widely used antibiotic that accumulates in animal foods, posing a threat to human health and even causing environmental pollution. This research aimed to establish a rapid method for the detection of TC. To this end, sodium alginate-protected gold nanoclusters (SA-AuNCs) were synthesized, which combined with europium ions (Eu3+) to construct a ratiometric-sensing platform for the detection of TC. When added TC, Eu3+ interacted with TC could result in enhanced fluorescence at 620 nm, which was used as a response signal, while the fluorescence intensity of SA-AuNCs remained unchanged, acting as a reference signal. Accordingly, a linear relationship was established in a wide range of TC (0-60 μM) and the detection limit (LOD) was 22.07 nM. The recoveries of the spiked samples ranged from 94.71% to 109.73%, implying that the as-proposed method could be successfully applied to detect TC in real samples. Furthermore, color information was extracted from the fluorescence images taken with a smartphone and analyzed by MATLAB, in which a visual mini program could be designed for calculating the channel values of red (R), green (G), and blue (B) of the generated fluorescence images. Utilizing the image processing functions and data processing capabilities of MATLAB, the obtained R/G values were selected for the semi-quantitative detection of TC in real samples without any time-consuming pretreatment and expensive instruments, demonstrating the great potential prospects of integrating MATLAB algorithm with SA-AuNCs-based ratiometric fluorescence probe into one ideal system for the development of rapid food assay.
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