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化学学报
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化学学报 ›› 2000, Vol. 58 ›› Issue (5): 524-528. 上一篇    下一篇

研究论文

DNA修饰电极的研究: VIII. 1, 10-菲咯啉存在时钴离子在ssDNA 修饰金电极上 的电化学行为及痕量钴的检测

庞代文;陆琪;赵元弟;张敏   

  1. 武汉大学化学系.武汉(430072)
  • 发布日期:2000-05-15

DNA-modified electrodes: VIII. Electrochemical behavior of Co^3^+^/^2^+ at single-stranded DNA modified gold electrodes in the presence of 1, 10-phenanthroline and the detection of trace cobalt

Pang Daiwen;Lu Qi;Zhao Yuandi;Zhang Min   

  1. Wuhan Univ, Dept Chem.Wuhan(430072)
  • Published:2000-05-15

PDF

402

被引次数

17

发现在过量1,10-菲咯啉存在时,Co^3^+^/^2^+在单链DNA(ssDNA)修饰金电极上的电化学响应显著增强。采用紫外光谱和循环伏安法考察了Co^3^+^/^2^+/1,10-菲咯啉体系与sSDNA的相互作用,并利用Co^3^+^/^2^+在1,10-菲咯啉存在时在ssDNA修饰金电极上的高灵敏电化学响应对痕量钴离子进行了测定。

关键词: 脱氧核糖核酸, 修饰电极, 菲咯啉, 钴离子, 金电极, 电化学, 痕量分析

The current response of Co^3^+^/^2^+ was dramatically enhanced at single-stranded DNA (ssDNA) modified gold electrodes in the presence of excess 1, 10-phenanthroline. The interaction between Co^3^+^/^2^+/1, 10-phenanthroline and ssDNA was investigated by ultraviolet spectroscopy and cyclic voltammetry. Based on the highly sensitive electrochemical responses of Co^3^+^/^2^+ at ssDNA modified gold electrodes in the presence of 1, 10-phenanthroline, a method for the detection of trace cobalt was developed.

Key words: DEOXYRIBONUCLEIC ACID, MODIFIED ELECTRODE, PHENANTHROLINE, COBALT ION, ELECTROCHEMISTRY, TRACE ANALYSIS

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