▎ 摘　　要

In this work, tanshinone IIA (TAN) was successfully detected using an effective and facile electrochemical sensor based on an RGO/Au (reduced graphene oxide/gold nanoparticle)-modified electrode. RGO was prepared using a microwave-assisted technique. For the preparation of the RGO/Au nanocomposite, Au nanoparticles were electrodeposited onto the surface of RGO. The electrochemical response of the sensor to TAN reduction was investigated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The electrochemical activity of TAN is significantly enhanced when using the RGO/Au-modified GCE. Our sensor shows a desirable linear response to TAN concentration in the range of 0.01 - 10 mu M. Furthermore, the sensor shows potential for use in the determination of TAN in Salvia extract samples.