DNA电化学传感器用于重金属离子检测的研究

Study on application of DNA electrochemical sensor for detection of heavy metal ions

综述了常用的DNA修饰电极的制备方法,简单介绍了其测定金属离子的原理。详细阐述了阴、阳离子型氧化还原指示剂在测定过程中的信号变化,从而实现重金属离子定量分析的机理。在此基础上,重点介绍了DNA电化学传感器对Pb^(2+)、Cu^(2+)、Hg^(2+)、Ag^+、Cd^(2+)的检测,并对其今后的发展方向进行了展望。

This paper reviews the frequently used preparation methods of DNA modified electrode and briefly introduces the principle of determining metal ion by using it. The signal changes of the anion and cationic redox indicators in the determination process are described in detail,which realizes the mechanism of heavy metal ion quantitative analysis. Based on this,the detection of Pb2＋,Cu2＋,Hg2＋,Ag＋and Cd2＋by DNA electrochemical sensor is mainly introduced and the future development trend for DNA electrochemical sensor is prospected.