Simultaneous Titration of Ternary Mixtures of Pb(II), Cd(II) and Cu(II) with Potentiometric Electronic Tongue Detection

Deivy Wilson, Salvador Alegret, Manel delValle

Research output: Contribution to journalArticleResearchpeer-review

5 Citations (Scopus)

Abstract

© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. An automatic titration method is reported to resolve ternary mixtures of transition metals (Pb<sup>2+</sup>, Cd<sup>2+</sup> and Cu<sup>2+</sup>) employing electronic tongue detection and a reduced number of pre-defined additions of EDTA titrant. Sensors used were PVC membrane selective electrodes with generic response to heavy-metals, plus an artificial neural network response model. Detection limits obtained were ca. 1 mg L<sup>-1</sup> for the three target ions and reproducibilities 3.0% for Pb<sup>2+</sup>, 4.1% for Cd<sup>2+</sup> and 5.2% for Cu<sup>2+</sup>. The system was applied to contaminated soil samples and high accuracy was obtained for the determination of Pb<sup>2+</sup>. In the determination Cd<sup>2+</sup> and Cu<sup>2+</sup>, sample matrix showed a significant effect.
Original languageEnglish
Pages (from-to)336-342
JournalElectroanalysis
Volume27
Issue number2
DOIs
Publication statusPublished - 1 Jan 2015

Keywords

  • Artificial neural networks
  • Electronic tongue
  • Ion selective electrodes
  • Sensor array
  • Simultaneous titration
  • Transition metals

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