دانلود مقاله Selective voltammetric determination of metionine at a modified carbon paste electrode incorporating multi-walled carbon nanotube and Cu2O nanoparticles
سال انتشار: ۱۳۸۹
محل انتشار: اولین همایش ملی توسعه تکنولوژی در صنایع نفت، گاز و پتروشیمی
تعداد صفحات: ۸
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.