Real Time Automatic System for the Impedimetric Monitoring of Bacterial Growth

Xavier Muñoz-Berbel, Roger Escudé-Pujol, Núria Vigués, Montserrat Cortina-Puig, Cristina García-Aljaro, Jordi Mas, Francesc Xavier Muñoz

Research output: Contribution to journalArticleResearchpeer-review

1 Citation (Scopus)

Abstract

This note describes the design and construction of new Virtual Instrumentation implemented in LabView 7.1 for the real time monitoring of the concentration of Escherichia coli cultures using impedance spectroscopy and platinum electrode chips. A hand-made Sequential Injection Analysis system was used for both the transport of microbiological samples from the incubator to the electrochemical cell, where they were measured, and the elimination of residues. The impedimetric approach showed good correlation when compared with a standard method, fluorescence microscopy counting after filtration and staining of bacterial samples, until 10 7 colony forming units per mL was achieved. © 2011 Copyright Taylor and Francis Group, LLC.
Original languageEnglish
Pages (from-to)2571-2581
JournalAnalytical Letters
Volume44
DOIs
Publication statusPublished - 1 Nov 2011

Keywords

  • Bacteria concentration
  • Impedance measurements
  • Platinum electrodes
  • Sequential injection analysis
  • Virtual instrument

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