Cole, Marina, Covington, James A. and Gardner, J. W. (2011) Combined electronic nose and tongue for a flavour sensing system. Sensors and Actuators B: Chemical, Vol.156 (No.2). pp. 832-839. doi:10.1016/j.snb.2011.02.049

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Abstract

We present a novel, smart sensing system developed for the flavour analysis of liquids. The system comprises both a so-called "electronic tongue" based on shear horizontal surface acoustic wave (SH-SAW) sensors analysing the liquid phase and a so-called "electronic nose" based on chemFET sensors analysing the gaseous phase. Flavour is generally understood to be the overall experience from the combination of oral and nasal stimulation and is principally derived from a combination of the human senses of taste (gustation) and smell (olfaction). Thus, by combining two types of microsensors, an artificial flavour sensing system has been developed. Initial tests conducted with different liquid samples, i.e. water, orange juice and milk (of different fat content), resulted in 100% discrimination using principal components analysis; although it was found that there was little contribution from the electronic nose. Therefore further flavour experiments were designed to demonstrate the potential of the combined electronic nose/tongue flavour system. Consequently, experiments were conducted on low vapour pressure taste-biased solutions and high vapour pressure, smell-biased solutions. Only the combined flavour analysis system could achieve 100% discrimination between all the different liquids. We believe that this is the first report of a SAW-based analysis system that determines flavour through the combination of both liquid and headspace analysis.

Item Type:	Journal Article
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:	Faculty of Science > Engineering
Library of Congress Subject Headings (LCSH):	Flavor, Acoustic surface wave devices, Field-effect transistors
Journal or Publication Title:	Sensors and Actuators B: Chemical
Publisher:	Elsevier Science SA
ISSN:	0925-4005
Official Date:	August 2011
Dates:	Date Event August 2011 Published
Volume:	Vol.156
Number:	No.2
Page Range:	pp. 832-839
DOI:	10.1016/j.snb.2011.02.049
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	European Commission (EC)

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