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Study On The Electrochemical Behaviour Of The Anticancer Herbal Drug Emodin

Baoxian Ye, Liping Wang, Zongpei Zhang

The electrochemical behaviour of the anticancer herbal drug emodin was investigated by cyclic voltammetry (CV) at glassy carbon electrode. In 0.05 M NH3-NH4Cl (50% ethanol, pH 7.2) buffer solution, a pair of quasi-reversible redox peaks with peak potentials of Ep1 = -0.688V and Ep2 = -0.628V and an irreversible anodic peak, which was a typical anodic peak of emodin, with Ep3 = -0.235V were appeared at scan rate of 100 mV/s. The irreversible anodic peak currents are linearly relationship with emodin concentrations in the range of 8.9×10-8 M to 7.8×10-6 M with pre-concentration 80s under -0.620V. Using established method, the emodin in herbal drug was determined with satisfactory results and separation was unnecessary. Moreover, the electrode process dynamics parameters were investigated too by electrochemical techniques.