石墨烯量子点作为荧光探针定量分析糖果中苋菜红的含量

doi:10.16039/j.cnki.cn22-1249.2018.07.014

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摘要建立了一种利用石墨烯量子点荧光猝灭定量分析糖果中苋菜红含量的方法。讨论了溶液pH值和反应时间对苋菜红与石墨烯量子点相互作用的影响。在最优条件下，石墨烯量子点荧光强度的降低（F₀/F）与苋菜红浓度（0.5 - 3 μg/L）之间具有良好的线性关系。通过变温实验、紫外吸收光谱和计算荧光猝灭常数对猝灭机理进校了讨论，结果显示苋菜红与石墨烯量子点之间的作用为基于石墨烯量子点与苋菜红生产复合物的静态猝灭过程。此外，该方法被用来定量分析糖果样品中苋菜红的含量，表明该方法可用于实际食品样品中苋菜红的定量分析。

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	金丽
	王影
	刘芳同
	张棵实
	张建坡

关键词: 石墨烯量子点荧光探针苋菜红有机染料

Abstract: A fluorescence quenching method was used to quantitative analysis amaranth in candy based on the fluorescent quenching of graphene quantum dots. In order to obtain reliable results, effect of pH and reaction time on fluorescent quenching of graphene quantum dots by amaranth was studied. Under the optimized conditions, the fluorescence quenching of graphene quantum dots F0/F had a linear relationship with the concentration of amaranth between 0.5 - 3 μg/L. Temperature-dependent experiment, absorbance spectra and dynamic fluorescence quenching rate constant were used to discuss the quenching mechanism, all results indicated that it was a static quenching process based on the formation of complex between graphene quantum dots and amaranth through hydrogen bond. Particularly, this method was used to quantitative analysis candy sample, indicated that this method could be applied for practical food samples.

Key words: Graphene quantum dots fluorescence probe amaranth azo dye

出版日期: 2018-07-25 发布日期: 2018-07-25 整期出版日期: 2018-07-25

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引用本文:

金丽, 王影, 刘芳同, 张棵实, 张建坡. 石墨烯量子点作为荧光探针定量分析糖果中苋菜红的含量[J]. 吉林化工学院学报, 2018, 35(7): 61-65.
JIN Li, WANG Ying, LIU Fang-tong, ZHANG Ke-shi, ZHANG Jian-po. The Quantitative Analysis of amaranth in candy by Using Graphene Quantum Dots as a Fluorescence-Quenching Probe. Journal of Jilin Institute of Chemical Technology, 2018, 35(7): 61-65.

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https://xuebao.jlict.edu.cn/CN/10.16039/j.cnki.cn22-1249.2018.07.014 或 https://xuebao.jlict.edu.cn/CN/Y2018/V35/I7/61

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