Methodological variation in headspace analysis of liquid samples using electronic nose

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dc.contributor.authorKnobloch, Henri
dc.contributor.authorTurner, Claire
dc.contributor.authorSpooner, Andrew
dc.contributor.authorChambers, Mark
dc.date.accessioned2009-07-25T11:46:30Z
dc.date.available2009-07-25T11:46:30Z
dc.date.issued2009-06-04
dc.description.abstractIn past years, numerous electronic nose (e-nose) developments have been published describing analyses of solid-, liquid- or gaseous media in microbiological-, environmental-, agricultural- or medical applications. However, little has been reported about complex methodological pitfalls that might be associated with commercially available e-nose technology. In this paper, some of these pitfalls such as temperature, the use of filters and mass flow using different sampling methods (static- and dynamic sampling) are described for two generations of conducting polymer e-noses (ST114/214, CPs, both Scensive Tech. Ltd.). A comparison with metal oxide semiconducting field effect transistor/metal oxide semiconductor (MOSFET/MOS) e-noses regarding stability across replicates and over time was made. Changes in temperature were found to give larger sensor responses, whereas the application of filters led to quantitative and qualitative changes in sensor responses due to a change in mass flow which was also affected by the sampling method. Static sampling provided more stable flows across replicates. Variation was investigated for CPs and MOSFET/MOS e-noses that gave different responses over time and across replicates. These methodological factors cause a lack of stability and reproducibility, demonstrating the pitfalls of e-nose technology and therefore limit their utility for discriminating between samples.en_UK
dc.identifier.citationHenri Knobloch, Claire Turner, Andrew Spooner, Mark Chambers, Methodological variation in headspace analysis of liquid samples using electronic nose, Sensors and Actuators B: Chemical, Volume 139, Issue 2, 4 June 2009, Pages 353-360en_UK
dc.identifier.issn0925-4005
dc.identifier.urihttp://hdl.handle.net/1826/3482
dc.identifier.urihttp://dx.doi.org/10.1016/j.snb.2009.03.007
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.subjectElectronic noseen_UK
dc.subjectTemperature effecten_UK
dc.subjectHeadspaceen_UK
dc.subjectFilteren_UK
dc.subjectSampling methoden_UK
dc.titleMethodological variation in headspace analysis of liquid samples using electronic noseen_UK
dc.typeArticleen_UK

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