In this study, we prepared a novel GC modified with 2-TBI (2-TBI/GC) by using electrochemical attachment to carry out the determination of Cd(II) ions as seen in Scheme 1. 2-TBI was used as the grafting material because it was easily bonded onto the GC surface. The 2-TBI/GC was characterized with CV, EIS, RAIRS, XPS and AFM.