Novel electrochemical sensor based on N-doped carbon nanotubes and Fe3O4 nanoparticles: Simultaneous voltammetric determination of ascorbic acid, dopamine and uric acid

- N-doped carbon nanotubes functionalized with Fe3O4 nanoparticles were successfully prepared.
- The nanocomposite was successfully immobilized into GCE electrode.
- The modified electrode showed electrocatalytic activity toward oxidation of ascorbic acid, dopamine and uric acid.
- Good linear ranges with lower detection limits were obtained.