A Khanmohamadi - Department of Analytical Chemistry, Islamic Azad University,Gachsaran branch,I.R.Iran
O Motamedi
S. Dadkhah

A carbon-paste electrode (CPE) chemically modified with multi wall carbon nanotube as a sensor and Cu2 O nanoparticles as a mediator was used as a electrochemical sensor for sensitive and highly selective voltammetric determination of metionine. This modified electrode showed very efficient electrocatalytic activity for anodic oxidation of metionine. In optimal conditions, linear ranges spanned a metionone concentration from 0.5 μM to150.0 μM and the detection limit was 0.7 μM at a signal-to-noise ratio of 2 . In addition, the sensor had good stability and reproducibility.

Carbon Paste Electrode, Modified Electrode, Multi Walled Carbon Nanotube, Cu 2O Nanoparticles, Metionine