Discrimination of Chemical Profiles of Some Bacterial Species by Analyzing Culture Headspace Air Samples Using TD-GC/MS

ISSN: 1875-6727 (Online)
ISSN: 1573-4110 (Print)


Volume 10, 4 Issues, 2014


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Current Analytical Chemistry

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Discrimination of Chemical Profiles of Some Bacterial Species by Analyzing Culture Headspace Air Samples Using TD-GC/MS

Author(s): Ileana-Andreea Rat iu, Victor Boco s-Bin tin tan, Matthew Turner, Victor-Hugo Moll and Charles Lawrence Paul Thomas

Affiliation: Faculty of Environmental Science and Engineering, Babe s-Bolyai University of Cluj-Napoca, Str. Fantanele nr. 30, 400294 Cluj-Napoca, Romania.

Abstract

In an attempt to discriminate and identify several bacterial species, headspace air samples above a series of bacterial cultures were interrogated using a TD-GC/MS system. Three microorganism strains with relatively low pathogenic character – Escherichia coli, Bacillus subtilis and Staphylococcus aureus – were investigated during a period of 72 hours from the inoculation. Air samples with a volume of 1 L each were collected from the headspace above the bacterial cultures in agar growth medium of a 5 cm3 volume kept in 30 cm3 glass vials, in Tenax-Carbograph desorption tubes, by using a custom-built sampling unit based upon a portable air sampling pump. One sample was taken for each of the 10 different cultures of a bacterial strain, at 24, 48 and 72 hours from the incubation. The adsorption tubes were analyzed using the TD-GC/MS system and the resulting datasets – chromatograms and associated mass spectra – were used to produce a qualitative insight into the chemical profile of the headspace air above the bacterial cultures. Analysis by TD-GC/MS indicated that the chemical profile of the headspace air samples was complex and changed during the three days monitoring period; also, there appeared to be a series of chemicals specific to individual species of microorganisms.




Keywords: Microorganisms identification, bacterial chemical profile, TD-GC/MS.

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Article Details

Volume: 10
Issue Number: 4
First Page: 488
Last Page: 497
Page Count: 10
DOI: 10.2174/157341101004140701105219
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