An amplified sensor based on improved carbon paste electrode with 1,3-Dipropylimidazolium Bromide and MgO/SWCNTs Nanocomposite for tradamol determination

The electrochemical behavior of tramadol at carbon paste electrode amplified with the 1,3-dipropylimidazolium bromide and MgO/SWCNTs nanocomposite (1,3-DI-Br/MgO/SWCNTs/CPE) has been studied in aqueous solutions. The oxidation of tramadol at the pH range of 6.0-9.0 has been investigated. At the optimum condition of pH 8.0, the tramadol shows an irreversible signal at 0.81 V. The scan rate investigation confirms a diffusion process for the electro-oxidation of tramadol at a surface of 1,3-DI-Br/MgO/SWCNTs/CPE. Square wave voltammetric investigation shows a linear relation between the tramadol current and concentration within the range of 0.05-280 mu M with a detection limit of 8.0 nM. The 1,3-DI-Br/MgO/SWCNTs/CPE has been applied to analyze the tramadol in injection and urine samples.