Abstract:

Poly pyrrole-carbon nanotube (PPy-CNT) composite electrodes were prepared with ultrasonication assisted pulsed polymerization technique. This technique possesses both advantages of ultrasonication and electrochemical polymerization. PPy-CNT composite was modified on the bare glassy carbon electrode (GCE) surface easily with pulsed deposition technique that provide more catalytically active surface compared to the bare GCE towards metamizol oxidation. Resulted electrode was characterized by scanning electron microscopy and used for investigation of metamizaol in pH:2 Britton-Robinson buffer solution. In the differential pulse voltammetric determination, the linear range was found as 5-500 mg L-1 with a detection limit of 1.6 mg L-1 . The overall results showed that PPy-CNT electrode has an excellent sensitivity, selectivity and anti-fouling properties for the voltammetric determination of metamizol. PPy-CNT/GCE sensor was applied succesfully to the determination of metamizol in novalgine sample.