Voltammetric determination of insecticide thiamethoxam on silver solid amalgam electrode

Parthena Chorti, Jan Fischer, Vlastimil Vyskocil, Anastasios Economou, Jiri Barek

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

This work demonstrates the applicability of differential pulse voltammetry (DPV) for the determination of the insecticide thiamethoxam at a non-toxic mercury meniscus modified silver solid amalgam electrode (m-AgSAE). The optimum supporting electrolyte was found to be Britton-Robinson (BR) buffer, pH 10. The target compound was quantified directly in spiked drinking and river water samples in the range from 100 μmol L-1 to limits of determination (LOQs) 0.36 and 0.46 μmol L-1, respectively. After preliminary separation and preconcentration by solid phase extraction (SPE) using Lichrolut EN cartridges, quantification in spiked river and drinking water samples was possible in the range from 100 nmol L-1 to LOQs 1.3 and 1.1 nmol L-1, respectively. m-AgSAE is practically non-toxic, possesses good mechanical stability and is easy to handle and activate and thus represents a suitable alternative to the hanging mercury drop electrode (HMDE).

Original languageEnglish
Pages (from-to)5-10
Number of pages6
JournalElectrochimica Acta
Volume140
DOIs
Publication statusPublished - 10 Sep 2014
Externally publishedYes

Keywords

  • Differential pulse voltammetry (DPV)
  • Drinking water
  • River water
  • Silver solid amalgam electrode
  • Solid phase extraction
  • Thiamethoxam

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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