应用化学 ›› 2023, Vol. 40 ›› Issue (2): 299-308.DOI: 10.19894/j.issn.1000-0518.220214

• 研究论文 • 上一篇    

基于无金属可见光诱导原子转移自由基聚合方法制备人血清白蛋白超微印迹传感器及其性能

姜士鹏, 周禹希, 孟沛然, 谢炎轩, 宋祉怡, 赵洹影, 孙越()   

  1. 辽宁师范大学化学化工学院,大连 116029
  • 收稿日期:2022-06-15 接受日期:2022-09-28 出版日期:2023-02-01 发布日期:2023-02-27
  • 通讯作者: 孙越
  • 基金资助:
    辽宁省自然科学基金面上项目(2021-MS-273);辽宁省“百千万人才工程”资助项目(2020921109);辽宁师范大学高端科研成果培育资助计划(GD20L001);辽宁师范大学本科生科研训练项目(CX202102008)

Preparation and Properties of Ultramicro Imprinting Sensor for Human Serum Albumin via Metal-free Visible-light-induced Atom Transfer Radical Polymerization

Shi-Peng JIANG, Yu-Xi ZHOU, Pei-Ran MENG, Yan-Xuan XIE, Zhi-Yi SONG, Huan-Ying ZHAO, Yue SUN()   

  1. School of Chemistry and Chemical Engineering,Liaoning Normal University,Dalian 116029,China
  • Received:2022-06-15 Accepted:2022-09-28 Published:2023-02-01 Online:2023-02-27
  • Contact: Yue SUN
  • About author:yuesun@lnnu.edu.cn
  • Supported by:
    the Liaoning Provincial Natural Science Foundation of China(2021-MS-273);the “Ten Million Talents Project” of Liaoning Province(2020921109);the High-end Researd Achievement Cultivation Funding Program of Liaoning Normal University(GD20L001);the Undergraduate Scientific Research Training Program of Liaoning Normal University(CX202102008)

摘要:

将荧光标记的人血清白蛋白(HSA)既作模板分子又作催化剂,利用无金属可见光诱导的原子转移自由基聚合方法,在纳米金(nAu)修饰的铂超微电极(Pt UME)表面制备分子印迹聚合物(MIPs),构建超微印迹传感器(MIPs/nAu/Pt UME),利用电化学循环伏安法、交流阻抗法、扫描电子显微镜和X射线光电子能谱等方法对所得传感器进行表征。进一步,以MIPs/nAu/Pt UME为工作电极,自制铂微电极为参比电极,铂丝为对电极,构建只需5 μL待测液的微体积检测体系,通过差分脉冲伏安法方法对HSA进行检测。在最优条件下,超微印迹传感器检测HSA的线性范围为1.0×10-9~1.0×10-2 mg/L,检出限为3.4×10-10 mg/L,相关系数为R2=0.9980。考察了血红蛋白、肌红蛋白、小鼠IgG和牛血清白蛋白对检测HSA的干扰,并探究了传感器的一致性和重现性。最后,利用MIPs/nAu/Pt UME对实际样品进行检测,得到加标回收率为96.0%~104.5%,表明制备的传感器具有一定的实际应用性。

关键词: 无金属可见光诱导原子转移自由基聚合, 超微印迹传感器, 人血清白蛋白, 微体积检测

Abstract:

The molecularly imprinted polymers (MIPs) for human serum albumin (HSA) are prepared via metal-free visible-light-induced atom transfer radical polymerization (MVL ATRP) on the surface of Pt ultramicroelectrodes (Pt UME) that have been covered with electrodeposited nano gold (nAu). In the preparation process, the fluorescein isothiocyanate labeled HSA (FITC-HSA) is used both as template molecules of MIPs and the catalyst of MVL ATRP. The obtained MIPs/nAu/Pt UME electrode is characterized by scanning electron microscope, energy dispersive X-ray spectroscopy, cyclic voltammetry, electrochemical impedance spectroscopy and X-ray photoelectron spectroscopy. Furthermore, platinum microelectrode works as the reference electrode, MIPs/nAu/Pt UME is used as working electrode and platinum wire is used as the counter electrode, a microvolume detection system of only 5 μL is constructed and used to detect HSA by differential pulse voltammetry method. Under the optimal conditions, the MIPs/nAu/Pt UME electrode (sensor) could determine HSA in the linear range from 1.0×10-9 to 1.0×10-2 mg/L with a detection limit of 3.4×10-10 mg/L (S/N=3), and the correlation coefficient of 0.9980. With hemoglobin, myoglobin,mouse IgG and bovine serum albumin (BSA) as interferers, MIPs/nAu/Pt UME electrode shows good selectivity toward HSA. The reproducibility and consistency of the sensor is also investigated. Finally, the actual samples of human serum are determined by the standard addition method. The obtained recovery of HSA is from 96.0% to 104.5%, showing its potential applications in clinical and diagnostic research.

Key words: Metal-free visible-light-induced atom transfer radical polymerization, Ultramicro imprinting sensor, Human serum albumin, Microvolume detection

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