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Issue 5, 2008
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An in situ amperometric biosensor for the detection of vapours from explosive compounds

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Abstract

An amperometric biosensor based on genetically-modified enzymes was used for the in situdetection of trace vapours from a number of explosive compounds. The vapour samples that were generated from a purpose-built vapour generator were collected and pre-concentrated using a trap able to concentrate samples at a rate of 60-fold per minute of sampling. The amperometric biosensor achieved a remarkably low vapour detection limit of 6 parts per trillion from a room temperature sample. The specific activity of the reported enzyme toward a number of explosive compounds was also confirmed using absorbance measurements.

Graphical abstract: An in situ amperometric biosensor for the detection of vapours from explosive compounds

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Publication details

The article was received on 30 Aug 2007, accepted on 20 Nov 2007 and first published on 30 Nov 2007


Article type: Paper
DOI: 10.1039/B713269G
Citation: Analyst, 2008,133, 621-625

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    An in situ amperometric biosensor for the detection of vapours from explosive compounds

    C. D. Gwenin, M. Kalaji, C. M. Kay, P. A. Williams and D. N. Tito, Analyst, 2008, 133, 621
    DOI: 10.1039/B713269G

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