Multi-walled carbon nanotube/poly(glycine) modified carbon paste electrode for the determination of dopamine in biological fluids and pharmaceuticals

- MWCNTs/poly(glycine) at CPE improves redox kinetics of dopamine.
- Presence of MWCNTs increases the extent of polymerization of glycine.
- 100% exclusion of AA signal below the concentration of 3.1 × 10−4 M.
- Simple, cheap, reproducible and biocompatible.
- Successful estimation of dopamine in injection and blood serum.