Simultaneous Determination of Zn(II), Cu(II), Cd(II) and Pb(II) in Soil Samples Employing an Array of Potentiometric Sensors and an Artificial Neural Network Model

Deivy Wilson, Juan Manuel Gutiérrez, Salvador Alegret, Manel DelValle

Research output: Contribution to journalArticleResearchpeer-review

14 Citations (Scopus)

Abstract

A sensor array of 9 potentiometric PVC sensors has been employed for the simultaneous determination of heavy metals in soil. Sensors were firstly characterized in their response: Nernstian behavior, a concentration range from ca. 10-6 to 10-2M and selectivity coefficients confirming that all sensors had cross-response for the target ions. The mixed response system was modeled employing Artificial Neural Networks. The proposed tool was applied to the determination of Pb2+, Cd2+, Cu2+ and Zn2+ in soils at the mg kg-1 level with satisfactory performance. Results were compared and validated against AAS reference methodology, with correlations R2>0.948 for the four heavy metals considered. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish
Pages (from-to)2249-2256
JournalElectroanalysis
Volume24
Issue number12
DOIs
Publication statusPublished - 1 Dec 2012

Keywords

  • Electronic tongue
  • Heavy metals
  • Ion selective electrode
  • Sensor array
  • Soil

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