Journal
ANALYST
Volume 137, Issue 8, Pages 1950-1955Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2an15795k
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Funding
- Iran National Science Foundation (INSF)
- Yazd University Research Council
- IUT Research Council
- Excellence in Sensors
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A novel carbon paste electrode modified with nanosized mesoporous MCM-41 was prepared, and used as an electrochemical sensor to study the electro oxidation of levodopa (LD), carbidopa (CD) and their mixtures. Using differential pulse voltammetry (DPV), a highly selective and simultaneous determination of LD and CD has been explored at the modified electrode. The electrochemical sensor displayed a good resolving function for the overlapping voltammetric responses of LD and CD into two separate peaks with a potential difference of 370 mV. DPV peak currents of LD increased linearly with concentration over the 0.13 mu M to 1250.00 mu M range and exhibited a detection limit of 0.072 mu M. Also, the proposed electrochemical sensor was used for the determination of LD and CD in some real samples, using the standard addition method.
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