应用化学 ›› 2023, Vol. 40 ›› Issue (4): 509-517.DOI: 10.19894/j.issn.1000-0518.220340

• 研究论文 • 上一篇    下一篇

热解法制备油溶性碳量子点用于土霉素的检测

张月霞, 范小鹏, 曹宇娟, 杨欣彤, 李忠平, 杨振华(), 董川   

  1. 山西大学环境科学研究所,太原 030006
  • 收稿日期:2022-10-19 接受日期:2023-02-20 出版日期:2023-04-01 发布日期:2023-04-17
  • 通讯作者: 杨振华
  • 基金资助:
    山西省回国留学人员科研项目(2020-002)

Synthesis of Oil-soluble Carbon Quantum Dots by Pyrolysis Method for the Detection of Oxytetracycline

Yue-Xia ZHANG, Xiao-Peng FAN, Yu-Juan CAO, Xin-Tong YANG, Zhong-Ping LI, Zhen-Hua YANG(), Chuan DONG   

  1. Institute of Environmental Science,Shanxi University,Taiyuan 030006,China
  • Received:2022-10-19 Accepted:2023-02-20 Published:2023-04-01 Online:2023-04-17
  • Contact: Zhen-Hua YANG
  • About author:yzh429@sxu.edu.cn
  • Supported by:
    Shanxi Scholarship Council of China(2020-002)

摘要:

以柠檬酸、谷胱甘肽和油胺为原料,采用热解法制备了油溶性荧光碳量子点(o-CDs)。该o-CDs具有良好的光化学性能以及光学稳定性,激发波长与发射波长分别为375和440 nm,量子产率为0.48。基于土霉素对碳量子点的荧光淬灭效应,建立了一种灵敏度高、选择性好的土霉素荧光检测方法,并将该方法应用于实际样品牛奶中土霉素的检测。土霉素对o-CDs的荧光淬灭程度与土霉素的浓度(0.77~16.12 μg/mL)呈良好的线性关系,检出限为0.14 μg/mL,牛奶样品中的加标回收率在97.13%~104.18%之间,RSD值小于5%,证实了该方法的准确性。该o-CDs有望应用于食品领域中土霉素的检测。

关键词: 热解法, 油溶性碳量子点, 土霉素, 荧光淬灭

Abstract:

Novel oil-soluble fluorescent carbon quantum dots (o-CDs) are prepared by pyrolysis with citric acid, glutathione and oleamine as raw materials. The o-CDs have good photochemical properties and optical stability. The maximum excitation wavelength and emission wavelengths are located at 375 and 440 nm, respectively, and the fluorescence quantum yield is 0.48. A fluorescence sensor with high sensitivity and selectivity for detection of oxytetracycline is established based on the fluorescence quenching effect. The o-CDs based fluorescence sensor exhibits a good linear relationship between the relative fluorescence intensity and the concentration of oxytetracycline (0.77~16.12 μg/mL) with the detection limit of 0.14 μg/mL. Furthermore, the sensor has the potential to determine oxytetracycline in milk samples. The spiked recoveries are in the range of 97.13%~104.18%, and the RSD value is less than 5%. The accuracy of the method is verified. The o-CDs is capable of monitoring oxytetracycline in food industry.

Key words: Pyrolysis method, Oil-soluble carbon dots, Oxytetracycline, Fluorescence quenching

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