Voltammetric determination of 4-Nitrophenol using a novel type of silver amalgam paste electrode

Abdul Niaz, Jan Fischer, Jiří Barek, Bogdan Yosypchuk, Sirajuddin, Muhammad Iqbal Bhanger

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83 Citations (Scopus)

Abstract

A differential pulse voltammetric (DPV) method was developed for the determination of 4-nitrophenol (4-NP) at a newly developed silver amalgam paste electrode (AgA-PE) in Britton -Robinson buffer pH 3.0. The electrode is based on a disposable plastic pipette tip filled with paste amalgam based on a mixture of mercury and fine silver powder (9:1, w/w). The experimental parameters, such as pH of Britton -Robinson buffer and activation and regeneration potential of the electrode surface were optimized. The reduction peak current dependences were linear for the concentration of 4-NP from 0.2 to 100 mM. The method showed reproducible results with RSD (n=45) of 1.7%. The limit of determination (LOD) was 0.3 mM. The method was successfully applied for the direct determination of 4-NP in drinking water.

Original languageEnglish
Pages (from-to)1786-1791
Number of pages6
JournalElectroanalysis
Volume21
Issue number16
DOIs
Publication statusPublished - 1 Aug 2009
Externally publishedYes

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Keywords

  • Drinking water
  • Environmental chemistry
  • Silver amalgam paste electrode
  • Voltammetry

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry

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