Electronic tongue for the determination of alkaline ions using a screen-printed potentiometric sensor array

Manuel Gutiérrez, Victor M. Moo, Salvador Alegret, Lorenzo Leija, Pablo R. Hernández, Roberto Muñoz, Manel Del Valle

Research output: Contribution to journalArticleResearchpeer-review

23 Citations (Scopus)

Abstract

A disposable all-solid-state planar-type potentiometric electronic tongue has been developed with a five-sensor array screen-printed on a polymeric substrate. The fabrication method enables simple and reproducible mass-production of low-cost electronic tongue systems, since the sensors showed good reproducibility (0.96% RSD), repeatability (0.58% RSD) and lifetime (8% decrease of sensitivity after 37 days in solution). The system was used for the simultaneous determination of NH 4+ , K + and Na + ions in synthetic and natural surface water samples. The signals were processed by using a multilayer artificial neural network which was optimized for that purpose. Correct results were obtained for the three ions in synthetic samples. In natural surface waters, ammonium and potassium ions could be determined, while sodium ions showed biased results due to the effect of the complex matrix. © 2007 Springer-Verlag.
Original languageEnglish
Pages (from-to)81-88
JournalMicrochimica Acta
Volume163
Issue number1-2
DOIs
Publication statusPublished - 1 Sep 2008

Keywords

  • Artificial neural networks
  • Electronic tongue
  • Potentiometric sensors
  • Screen-printing technique
  • Sensor array

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