Voltammetric Study of Sudan I on Glass Carbon Electrode and Its Interaction with DNA

摘要

The electrochemical behavior of sudan I at glassy carbon electrode as well as its interaction with DNAwere studied using voltammetric technique. The results indicated that the electrochemical oxidation ofsudan I was an irreversible process and the electrode process was controlled by a adsorptive step. In thepresence of DNA, the oxidation peak current of sudan I decreased and the peak potential shiftedpositively, which indicated that the binding of sudan I to DNA was via intercalation. The binding numberis 1 and binding constant is 1.44×103.