Voltammetric determination of the herbicide Bifenox in drinking and river water using a silver solid amalgam electrode

J. Barek, Dana Cabalková, Jan Fischer, T. Navrátil, Karolina Pecková, Bogdan Yosypchuk

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

A new method for the determination of submicromolar and nanomolar concentrations of herbicide Bifenox using differential pulse voltammetry at a mercury meniscus modified silver solid amalgam electrode is described. This new type of working electrode is non-toxic, environmentally friendly, and compatible with principles of green analytical chemistry, and its surface can be easily electrochemically renewed in the case of passivation. The newly developed direct differential pulse voltammetric determination of Bifenox gives limit of determination 6.7·10-7 and 6.9·10-7 M in drinking and river water, respectively. Both the selectivity and the sensitivity can be further increased by preliminary separation and preconcentration using solid phase extraction. This combination enables to reach limit of determination 0.9 × 10-9 and 1.5 × 10-9 M for drinking and river water, respectively. Because of lower running and investment costs, this electroanalytical method can be used for large scale monitoring of possible water contamination with tested herbicide.

Original languageEnglish
Pages (from-to)83-86
Number of pages4
JournalEnvironmental Chemistry Letters
Volume9
Issue number1
DOIs
Publication statusPublished - 1 Mar 2011
Externally publishedYes

Keywords

  • Bifenox
  • Differential pulse voltammetry
  • Solid phase extraction
  • Solid silver amalgam electrode

ASJC Scopus subject areas

  • Environmental Chemistry

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