Poly(Rhodamine B) modified carbon paste electrode for the selective detection of dopamine

► Inability to detect low concentrations of ascorbic acid makes it a unique electrode material as a sensor for dopamine. ► Ability of MCPE/Rhodamine B to detect micromolar concentrations of dopamine in presence of ascorbic acid and uric acid. ► Wide linear dynamic range for dopamine at physiological pH for any electro-polymerization technique. ► MCPE/Rhodamine B has shown good reproducibility, sensitivity and stability.