Electrochemical synthesis of polymelamine/gold nanoparticle modified carbon paste electrode as voltammetric sensor of dopamine

Muji HARSINI*, Bernadeta Ayu WIDYANINGRUM, Erna FITRIANY, Denok Risky AYUPARAMITA, Ainiy Nur FARIDA, Afaf FARIDA, Fredy KURNIAWAN, Satya Candra WIBAWASAKTI

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Modifications of carbon paste electrodes (CPE) with polymelamine (PM) and gold nanoparticles (AuNPs) as dopamine (DA) sensors have been investigated. Electrodes were made by coating PM by electropolymerization from melamine solution on the surface of CPE, then AuNPs were made by electrochemically reducing HAuCl4 solution. AuNPs/PM/CPE electrodes were used as dopamine sensors by using cyclic voltammetry (CV) and pulse differential voltammetry (DPV) techniques. The results showed that the electrodes gave a linearity of 0.2–11 µM, a detection limit of 0.067 µM, and recovery value of 98.78 %± 0.34% in the analysis of urine samples spiked with dopamine. The electrodes gave perfect peak potential for separation from DA, uric acid (UA) and ascorbic acid (AA).

Original languageEnglish
Article number100052
JournalChinese Journal of Analytical Chemistry
Volume50
Issue number4
DOIs
Publication statusPublished - Apr 2022

Keywords

  • Dopamine
  • Electropolymerization
  • Gold nanoparticles
  • Modified electrode
  • Polymelamine
  • Voltammetry

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