Journal
MICROCHIMICA ACTA
Volume 169, Issue 1-2, Pages 153-159Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-010-0330-4
Keywords
Procaine hydrochloride; Multi-walled carbon nanotubes; Amidosulfonic acid; Electropolymerization
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Funding
- Natural Science Foundation of Hubei province [2008CDB034]
- Foundation of Hubei Provincial Department of Education for Young Scholars [Q20081006]
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A glassy carbon electrode was prepared that was coated with a composite film containing electropolymerized poly(amidosulfonic acid) and multi-walled carbon nanotubes. It was used to study the electrochemical response of procaine by differential pulse voltammetry. The results indicate that the electrode exhibits a remarkable improvement in the oxidation peak of procaine, and this led to a simple and sensitive method for the electroanalytical determination of procaine. The peak current is proportional to the concentration of procaine from 80 nM to 1.0 A mu M. The detection limit is 25 nM (S/N = 3). The modified electrode was successfully applied to the direct determination of procaine in pharmaceutical formulations.
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