碳量子点荧光猝灭法测定饮料中日落黄

苏安梅; 钟青梅; 余姝轶; 覃秀; 王益林

doi:10.3788/fgxb20173804.0530

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碳量子点荧光猝灭法测定饮料中日落黄

发光学应用及交叉前沿 | 更新时间：2020-08-12

- 碳量子点荧光猝灭法测定饮料中日落黄
- Fluorescence Quenching Method for Determination of Sunset Yellow in Drinks with Carbon Quantum Dots
- 发光学报 2017年38卷第4期页码：530-534
- 作者机构：
  
  广西大学化学化工学院广西生物炼制重点实验室,广西南宁,530004
- 作者简介：
- 基金信息：
  
  广西自然科学基金（2014GXNSFAA118328）;广西生物炼制重点实验室开放基金（GXKLB-2）;广西大学大学生创新创业训练计划（201610593162）资助项目
- DOI：10.3788/fgxb20173804.0530
  中图分类号： O611.4
- 纸质出版日期：2017-4-5，
  
  收稿日期：2016-10-27，
  
  修回日期：2016-11-24，
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苏安梅, 钟青梅, 余姝轶等. 碳量子点荧光猝灭法测定饮料中日落黄[J]. 发光学报, 2017,38(4): 530-534

SU An-mei, ZHONG Qing-mei, YU Shu-yi etc. Fluorescence Quenching Method for Determination of Sunset Yellow in Drinks with Carbon Quantum Dots[J]. Chinese Journal of Luminescence, 2017,38(4): 530-534
苏安梅, 钟青梅, 余姝轶等. 碳量子点荧光猝灭法测定饮料中日落黄[J]. 发光学报, 2017,38(4): 530-534 DOI： 10.3788/fgxb20173804.0530.

SU An-mei, ZHONG Qing-mei, YU Shu-yi etc. Fluorescence Quenching Method for Determination of Sunset Yellow in Drinks with Carbon Quantum Dots[J]. Chinese Journal of Luminescence, 2017,38(4): 530-534 DOI： 10.3788/fgxb20173804.0530.

摘要

以柠檬酸为碳源制备碳量子点（CQDs）'所得碳量子点被394 nm的光激发后在484 nm处有较强的荧光发射'最大吸收波长为482 nm的日落黄能强烈猝灭碳量子点的荧光。基于该现象'发展了一种以碳量子点为荧光探针测定日落黄的分析方法'并探讨了荧光猝灭机理。在选定的实验条件下'该分析方法的线性检测范围为0.1~100 mol/L'检出限（3

）为0.051 mol/L。

Abstract

Water-soluble carbon quantum dots (CQDs) were prepared by using citric acid as carbon source. The obtained CQDs showed a strong emission at the wavelength of 484 nm

with an optimum excitation of 394 nm. Sunset yellow with maximum absorption wavelength at 482 nm could selectively quench the fluorescence of CQDs. Based on this principle

a fluorescent probe was developed for sunset yellow determination. Furthermore

the quenching mechanism of the CQDs was elucidated. A linear relationship was found in the range of 0.1-100 mol/L sunset yellow with the detection limit (3

) of 0.051 mol/L. Satisfactory results were achieved when the method was submitted to the determination of sunset yellow in liquid samples.

关键词

碳量子点荧光猝灭日落黄

Keywords

carbon quantum dotsfluorescence quenchingsunset yellow

references

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