Detection of bacterial contaminated milk by means of a quartz crystal microbalance based electronic nose

Z. Ali, W. T. O'Hare, B. J. Theaker

Research output: Contribution to journalArticleResearchpeer-review

18 Citations (Scopus)

Abstract

Headspace analysis by means of sensor arrays has been successfully applied to a wide range of qualitative applications. In this study, a six element array of coated Quartz Crystal Microbalance (QCM) sensors was used for the headspace analysis of milk volatiles. The sensors were exposed to uncontaminated samples of milk and samples contaminated with Pseudomonas fragi (Ps.fragi) or Escherichia coli (E. coli). Principal component analysis (PCA) was used to analyse the sensor array responses. No discrimination between uncontaminated milk samples and those contaminated with Ps. fragi was observed. This can be explained by Ps.fragi being a poor fermenter of milk. However, encouraging results were found for the discrimination between the milk samples and those contaminated with E. coli.

Original languageEnglish
Pages (from-to)155-161
Number of pages7
JournalJournal of Thermal Analysis and Calorimetry
Volume71
Issue number1
Publication statusPublished - 1 Jan 2003

Fingerprint

milk
Quartz crystal microbalances
quartz crystals
microbalances
electronics
pseudomonas
sensors
Sensor arrays
Escherichia
Escherichia coli
discrimination
Fermenters
Sensors
principal components analysis
Principal component analysis
Milk
Electronic nose

Cite this

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abstract = "Headspace analysis by means of sensor arrays has been successfully applied to a wide range of qualitative applications. In this study, a six element array of coated Quartz Crystal Microbalance (QCM) sensors was used for the headspace analysis of milk volatiles. The sensors were exposed to uncontaminated samples of milk and samples contaminated with Pseudomonas fragi (Ps.fragi) or Escherichia coli (E. coli). Principal component analysis (PCA) was used to analyse the sensor array responses. No discrimination between uncontaminated milk samples and those contaminated with Ps. fragi was observed. This can be explained by Ps.fragi being a poor fermenter of milk. However, encouraging results were found for the discrimination between the milk samples and those contaminated with E. coli.",
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Detection of bacterial contaminated milk by means of a quartz crystal microbalance based electronic nose. / Ali, Z.; O'Hare, W. T.; Theaker, B. J.

In: Journal of Thermal Analysis and Calorimetry, Vol. 71, No. 1, 01.01.2003, p. 155-161.

Research output: Contribution to journalArticleResearchpeer-review

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