大学化学 >> 2023, Vol. 38 >> Issue (2): 170-176.doi: 10.3866/PKU.DXHX202204064

化学实验 上一篇    下一篇

碳点增敏的流动注射化学发光法测定食品中二氧化硫的含量

曹烁, 曾鸿林, 周佳欣, 邵思远, 刘丰睿, 陈浩然, 陈芳()   

  • 收稿日期:2022-04-20 录用日期:2022-05-23 发布日期:2022-05-30
  • 通讯作者: 陈芳 E-mail:fchen@hust.edu.cn
  • 基金资助:
    华中科技大学教学研究项目(17074);华中科技大学化学与化工学院教学团队培育项目(201601)

Determination of SO2 in Food by Flow Injection Chemiluminescence with Carbon Dots as Sensitizer

Shuo Cao, Honglin Zeng, Jiaxin Zhou, Siyuan Shao, Fengrui Liu, Haoran Chen, Fang Chen()   

  • Received:2022-04-20 Accepted:2022-05-23 Published:2022-05-30
  • Contact: Fang Chen E-mail:fchen@hust.edu.cn

RichHTML

21

PDF

969

赞

摘要：

二氧化硫的检测对于食品安全保障具有重要意义。采用酸性高锰酸钾-亚硫酸盐化学发光体系，以碳点(Carbon Dots，CDs)为增敏剂，结合流动注射技术(Flow Injection Analysis，FIA)建立了一种用于检测食品中二氧化硫含量的简便方法。在优化的实验条件下，该方法的线性范围为1.0 × 10−5–3.0 × 10−4 mol∙L−1，检出限为7.79 × 10−6 mol∙L−1。该实验适合作为本科生仪器分析课程的教学实验，帮助学生掌握化学发光、流动注射分析技术的原理及应用，学习科学研究的基本方法，提高思考能力。

关键词: 流动注射, 化学发光, 碳点, 二氧化硫, 食品分析

Abstract:

The detection of sulfur dioxide is crucial for food safety. In this study, a flow injection chemiluminescence method for the determination of sulfur dioxide in food was established by using an acidic potassium permanganate sulfite system with carbon dots (CDs) as the sensitizer. Under the optimum experimental conditions, the linear range, and the detection limit of the method were 1.0 × 10−5–3.0 × 10−4 mol∙L−1 and 7.79 × 10−6 mol∙L−1, respectively. The experiment is suitable for teaching instrument analysis to undergraduates. This experiment enables students to master the principle and application of chemiluminescence and flow injection analysis, learn the basic methods of scientific research, and improve their thinking ability.

Key words: Flow injection, Chemiluminescence, Carbon dots, Sulfur dioxide, Food analysis