Abstract
The embedded carbon nanotubes modified bismuth-film electrode was prepared and the electrochemical behaviors of Cu at the modified electrode was studied with cyclic voltammetry in this work. The result shows that the oxidation peak of Cu at the modified electrode is single and irreversible. The oxidation peak potential (Epa) and current (ipa) are 0.045V and 10.90μA, respectively, with two protons and electrons transfer in this process. Then, the optimum condition of copper differential potentiometric stripping are the -1.1 V of accumulation potential, 0.4mg/L of bismuth concentrations, and pH 4.6 in the HAc-NaAc buffers. The height of peak is linear with the mass concentration of Cu over the range from 0 to 50.0μg/L under the best conditions.
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