Differential pulse voltammetric determination of 4-nitrophenol using a glassy carbon electrode: Comparative study between cathodic and anodic quantification

Rene Pfeifer, Priscila Tamiasso Martinhon, Célia Sousa, Josino C. Moreira, Marco Antonio Chaer do Nascimento, Jiří Barek

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Differential pulse voltammetry (DPV) at a glassy carbon electrode (GCE) was used for the determination of trace amounts of US EPA priority pollutant 4-nitrophenol (4NP) in Britton-Robinson buffer (BR) of pH 2.0 as an optimal base electrolyte. 4NP can be determined by DPV directly using either its electrochemical oxidation or reduction. The calibration curve was measured for both reactions in the same concentration range from 2 to 100 μmol.L-1. The calculated limits of detection and quantification are 0.17 and 0.56 μmol.L-1 (RSD = 2.3 % and R2 = 0.9987 for n = 5) for cathodic reduction and 0.39 and 1.29 μmol.L-1(RSD =5.3 %, R2 = 0.9928 for n = 5) for anodic oxidation.

Original languageEnglish
Pages (from-to)7261-7274
Number of pages14
JournalInternational Journal of Electrochemical Science
Volume10
Issue number9
Publication statusPublished - 1 Jan 2015
Externally publishedYes

Keywords

  • 4-Nitrophenol
  • Glassy carbon electrode
  • Oxidation
  • Passivation
  • Reduction
  • Voltammetry

ASJC Scopus subject areas

  • Electrochemistry

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