A surface renewable tris(1,10 phenanthroline 5,6 dione)iron(II) hexafluorophosphate (FePD) modified carbon ceramic electrode was constructed by dispersing FePD and graphite powder in methyltrimethoxysilane (MTMOS) based gels. The FePD modified electrode presented pH dependent voltammetric behavior, and its peak currents were diffusion controlled in 0.1 mol/L Na 2SO 4+H 2SO 4 solution (pH=0.4). In the presence of iodate, clear electrocatalytic reduction waves were observed and thus the chemically modified electrode was used as an amperometric sensor for iodate in common salt. The linear range, sensitivity, detection limit and response time of the iodate sensor were 5×10 6 -1×10 2 mol/L, 7.448 μA·L/mmol, 1.2×10 6 mol/L and 5 s, respectively. A distinct advantage of this sensor is its good reproducibility of surface renewal by simple mechanical polishing. A surface renewable tris (1,10 phenanthroline 5,6 dione) iron (II) hexafluorophosphate (FePD) modified carbon ceramic electrode was constructed by dispersing FePD and graphite powder in methyltrimethoxysilane (MTMOS) based gels. The FePD modified electrode presented pH dependent voltammetric behavior, and its peak currents were diffusion controlled in 0.1 mol / L Na 2 SO 4 + H 2 SO 4 solution (pH = 0.4). In the presence of iodate, clear electrocatalytic reduction waves were observed and thus the chemically modified electrode was used as an The linear range, sensitivity, detection limit and response time of the iodate sensor were 5 × 10 6 -1 × 10 2 mol / L, 7.448 μA · L / mmol, 1.2 × 10 6 mol / L and 5 s, respectively. A distinct advantage of this sensor is its good reproducibility of surface renewal by simple mechanical polishing.