Electrochemical Behavior of Quercetin on Multi-Walled Carbon Nanotubes Modified Carbon Paste Electrode and Interaction between Querectin with DNA

The electrochemical behavior of quercetin on multi-walled carbon nanotubes modified carbon paste electrode was studied by cyclic voltammetry and differential pulse voltammetry. It was found that the modified electrode could produce a pair of redox peaks, and potential of anodic peak and cathodic peak were 0.488, 0.348 V, respectively. Anodic peak current at the modified electrode was 5.3 times that of anodic peak current of the bare modified electrode. Multi-walled carbon nanotubes for quercetin had good catalytic activity. The electrode process was 2 protons and 2 electrons reaction. The interaction between quercetin and DNA using neutral red as a probe is mainly attributed to the embed mode.