Abstract
The electrochemical behavior of Cu(II) was investigated on three‐dimensional 3‐mercaptopropionic acid (MPA) assembled on gold nanoparticle‐modified glassy carbon (GNP/GC) electrode. The results demonstrated that the MPA monolayer inhibited the charging current while promoted the response of accumulated Cu(II) on GNP/GC electrode. The effects of pH, scan rate, and accumulation time on the voltammetric behavior of Cu(II) on the MPA/GNP/GC electrode were studied. The MPA modified electrode presented a voltammetric response linearly proportional to the Cu(II) concentration from 0.1 µg/l to 100 µg/l, with a detection limit of 3.2 ng/l. Moreover, this electrode was successfully applied to the determination of Cu(II) in tap water.
Notes
This work was supported by Science Research Foundation of Huazhong University of Science and Technology (2006Z002A).