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Differentiation of four Aspergillus species and one Zygosaccharomyces with two electronic tongues based on different measurement techniques
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
Chemistry Dept St. Petersburg University.
Chemistry Dept. St. Petersburg University.
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
2005 (English)In: Journal of Biotechnology, ISSN 0168-1656, Vol. 119, no 3, 300-308 p.Article in journal (Refereed) Published
Abstract [en]

Two electronic tongues based on different measurement techniques were applied to the discrimination of four molds and one yeast. Chosen microorganisms were different species of Aspergillus and yeast specie Zygosaccharomyces bailii, which are known as food contaminants. The electronic tongue developed in Linköping University was based on voltammetry. Four working electrodes made of noble metals were used in a standard three-electrode configuration in this case. The St. Petersburg electronic tongue consisted of 27 potentiometric chemical sensors with enhanced cross-sensitivity. Sensors with chalcogenide glass and plasticized PVC membranes were used. Two sets of samples were measured using both electronic tongues. Firstly, broths were measured in which either one of the molds or the yeast grew until late logarithmic phase or border of the stationary phase. Broths inoculated by either one of molds or the yeast was measured at five different times during microorganism growth. Data were evaluated using principal component analysis (PCA), partial least square regression (PLS) and linear discriminant analysis (LDA). It was found that both measurement techniques could differentiate between fungi species. Merged data from both electronic tongues improved differentiation of the samples in selected cases. © 2005 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2005. Vol. 119, no 3, 300-308 p.
Keyword [en]
electronic tongue, mold differentiation, sensor array, voltammetry, potentiometry
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-30017DOI: 10.1016/j.jbiotec.2005.04.017Local ID: 15463OAI: oai:DiVA.org:liu-30017DiVA: diva2:250836
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2011-01-12

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Söderström, CharlotteKrantz-Rülcher, Christina

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