Author/Authors :
Manjunatha ، Jamballi G. نويسنده Department of P.G. Studies and Research in Industrial Chemistry, Kuvempu University, Jnana Sahyadri, Shankaraghatta, Karnataka, India , , Kumara Swamy، ahaddurghatta E. نويسنده Department of P.G. Studies and Research in Industrial Chemistry, Kuvempu University, Jnana Sahyadri, Shankaraghatta, Karnataka, India , , Deraman، Mohamad نويسنده Department of P.G. Studies and Research in Industrial Chemistry, Kuvempu University, Jnana Sahyadri, Shankaraghatta, Karnataka, India ,
Abstract :
A sensitive and selective electrochemical method for the determination of
dopamine was developed using a rosaniline polymer film modified carbon paste electrode.
The rosaniline polymer film modified electrode showed excellent electrocatalytic activity
towards the oxidation of dopamine (DA) in phosphate buffer solution (pH 7.0). The
interference studies show that the modified electrode exhibits excellent selectivity in the
presence of ascorbic acid (AA). A significant improvement in cyclic voltammetric responses
to DA and AA (well-defined voltammetric peaks at potentials around 205, -43 mV for DA
and AA respectively) and a prominent enhancement of voltammetric sensitivity was observed
at the rosaniline polymer film modified CPE. Hence, this work provides a simple and easy
approach to selective detection of dopamine in the presence of ascorbic acid.
