Citation

Gwenin CD, Kalaji M, Kay CM, Williams PA, Tito DN. Analyst 2008; 133(5): 621-625.

Affiliation

School of Chemistry, Bangor University, Gwynedd, UK.

Copyright

(Copyright © 2008, Royal Society of Chemistry)

DOI

10.1039/b713269g

PMID

18427683

Abstract

An amperometric biosensor based on genetically-modified enzymes was used for the in situ detection 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.

Language: en