Electrochemical studies of dopamine, ascorbic acid and their simultaneous determination at a poly (rosaniline) modified carbon paste electrode

A cyclic voltammetric study

Jamballi G. Manjunatha, Bahaddurghatta E. Kumara Swamy, Mohamad Deraman

Research output: Contribution to journalArticle

9 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)426-438
Number of pages13
JournalAnalytical and Bioanalytical Electrochemistry
Volume5
Issue number4
Publication statusPublished - Aug 2013

Fingerprint

Ascorbic acid
Ointments
Ascorbic Acid
Dopamine
Carbon
Electrodes
Polymer films
Buffers
Phosphates
basic fuchsin
Oxidation

Keywords

  • Ascorbic acid
  • Dopamine
  • Electrochemistry
  • Electropolymerisation
  • Rosaniline

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry

Cite this

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title = "Electrochemical studies of dopamine, ascorbic acid and their simultaneous determination at a poly (rosaniline) modified carbon paste electrode: A cyclic voltammetric study",
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.",
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T1 - Electrochemical studies of dopamine, ascorbic acid and their simultaneous determination at a poly (rosaniline) modified carbon paste electrode

T2 - A cyclic voltammetric study

AU - Manjunatha, Jamballi G.

AU - Kumara Swamy, Bahaddurghatta E.

AU - Deraman, Mohamad

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AB - 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.

KW - Ascorbic acid

KW - Dopamine

KW - Electrochemistry

KW - Electropolymerisation

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