▎ 摘　　要

A simple and effective electrochemical sensor with the electrode modified with RGO/Au (reduced graphene oxide-gold nanoparticle) nanocomposite was developed for the determination of ternatin. Microwave assisted approach was used for the preparation of RGO and then the RGO/Au was obtained by the electrodeposition of Au nanoparticles on RGO surface. Subsequently, electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) were employed for investigating the electrochemical performance of proposed sensor toward the reduction of ternatin. Obviously, the electrochemical activity of ternatin reduction was greatly improved with the employment of RGO/Au nanocomposite modified electrode. The linear response range from 2 mu M to 600 mu M was obtained on the sensor. In addition, the proposed sensor can be effectively applied to the detection of ternatin in grape fern herb as well.