高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (5): 686.

• 论文 • 上一篇    下一篇

基于表面等离子体子共振的B因子传感器

宋大千, 牟颖, 赵晓君, 张寒琦, 孙晶, 梁枫, 曹彦波, 金钦汉   

  1. 吉林大学化学系, 长春 130023
  • 收稿日期:1999-10-25 出版日期:2000-05-24 发布日期:2000-05-24
  • 通讯作者: 张寒琦(1948年出生),男,教授.博士生导师,从事光谱化学分析研究.
  • 基金资助:

    国家自然科学基金(批准号:29875010)

An Immunosensor of B Factor Based on Surface Plasmon Resonance

SONG Da-Qian, MU Ying, ZHAO Xiao-Jun, ZHANG Han-Qi, SUN Jing, LIANG Feng, CAO Yan-Bo, JIN Qin-Han   

  1. Department of Chemistry, Jilin University, Changchun, Jilin 130023, China
  • Received:1999-10-25 Online:2000-05-24 Published:2000-05-24

摘要: 以分辨率较高的一米光栅单色仪为分光系统,光电倍增管为检测系统,改进了自行组装的表面等离子体子共振(SPR)传感装置,提高了仪器的检测能力约50倍,对于发展改变波长模式的SPR传感器具有重要意义。以对金和抗体均有较强吸附作用的葡萄球菌A蛋白为基底膜,观测了人的B因子抗体和抗原之间免疫反应的动力学过程,并研究了B因子的定量测定。结果表明,B因子抗原的浓度在0.02~5μg/mL范围内与信号的响应值呈线性关系。该传感器灵敏度高,选择性和重现性均好。

关键词: 表面等离子体子共振, 传感器, A蛋白, B因子

Abstract: Anovel optical immunosensor based on surface plasmon resonance(SPR) has been developed for identification of antigen. The sensor is designed on the basis of fixing angle of incidence and measuring the reflected intensities in the wavelength range of 200-800 nm. Molecular self-assembling in solution is used to form the sensing membrane on gold substrate. The kinetic processes of sensing monolayer formation were studied. Human Bfactor (Bf), an activator of complement C3, was detected in the concentration range from 0.02-5 μg/mL. Under the selected experimental conditions, the sensor has a good sensitivity, repeatability, reversibility and selectivity.

Key words: Surface plasmon resonance, Sensor, Protein A, B factor

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