高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (03): 464.doi: 10.3969/j.issn.0251-0790.2012.03.006

• 分析化学 • 上一篇    下一篇

对巯基苯硼酸修饰石英晶体微天平传感器用于测定唾液酸

段淑静1, 何锡文1, 陈朗星1, 张玉奎1,2   

  1. 1. 南开大学化学学院, 天津 300071;
    2. 中国科学院大连化学物理研究所, 大连 116011
  • 收稿日期:2011-04-18 出版日期:2012-03-10 发布日期:2012-03-10
  • 通讯作者: 陈朗星, 男, 博士, 教授, 博士生导师, 主要从事分子光谱及分子识别研究.
    张玉奎, 男, 研究员, 博士生导师, 中国科学院院士, 主要从事色谱基础理论及新技术开发应用研究. E-mail:lxchen@nankai.edu.cn
  • 基金资助:

    国家"九七三"计划项目(批准号: 2007CB914101), 国家自然科学基金(批准号: 20875050)和天津市自然科学基金(批准号: 10JCZDJC17600)资助.

4-Mercapto-phenylboronic Acid Functionalized Quartz Crystal Microbalances Sensor for the Determination of Sialic Acid

DUAN Shu-Jing1, HE Xi-Wen1, CHEN Lang-Xing1, ZHANG Yu-Kui1,2   

  1. 1. College of Chemistry, Nankai University, Tianjin 300071, China;
    2. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116011, China
  • Received:2011-04-18 Online:2012-03-10 Published:2012-03-10

摘要:

硼酸与二醇的脱水缩合反应已被广泛用于检测或富集顺式邻位多羟基化合物. 本文以对巯基苯硼酸(MPBA)自组装修饰石英晶体微天平(QCM)芯片, 基于硼酸根对唾液酸的特殊反应, 建立了检测唾液酸(SA)的新方法. 采用扫描电子显微镜表征了对巯基苯硼酸对石英晶体微天平的功能化修饰过程, 并研究了溶液pH值对芯片表面亲和力的影响. 实验结果表明, 随着pH值的降低, 修饰芯片对唾液酸的结合能力增强, 而对参照物葡萄糖的结合能力则降低. 在pH=4.0的条件下, 该传感器在0.50~5.0 mmol/L范围内对唾液酸有很好的线性响应, 相关系数为0.9950, 检出限为0.15 mmol/L. 此传感器提供了一种简易的唾液酸检测方法, 为实际样品的测定奠定了基础.

关键词: 石英晶体微天平, 唾液酸, 对巯基苯硼酸, 自组装

Abstract:

A novel gold-coated quartz crystal microbalance(QCM) sensor functionalized by 4-mercapto-phenylboronic acid(MPBA) was fabricated for monitoring of sialic acid. The surface property of QCM sensor was characterized by scanning electron microscope. The density of MPBA on the surface of QCM was calculated by the frequency change of QCM. The basic principle of the MPBA-modified sensor is that boronic acid can form reversible covalent bonds with analytes containing cis-1,2-diols groups. The results show a linear response in the range of 0.50-5.0 mmol/L of sialic acid. The detection limit was 0.15 mmol/L(n=11) for sialic acid and high recovery of 101.7 for the spiked artificial urine sample was obtained.

Key words: Quartz crystal microbalance(QCM), Sialic acid(SA), 4-Mercapto-phenylboronic acid(MPBA), Self-assembled

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