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Published March 2000 | Supplemental Material
Journal Article Open

Highly Sensitive Detection and Discrimination of Biogenic Amines Utilizing Arrays of Polyaniline/Carbon Black Composite Vapor Detectors


Chemically-sensitive resistors have been developed that allow rapid detection of an important class of compounds, biogenic amines, at levels of 1−10 parts per trillion in ambient air. The materials are composites of a conducting organic polymer, the emeraldine salt of polyaniline, with particles of another conducting phase, carbon black. The resistance response of an EM−DBSA(1:0.5)/CB (80:20) detector exposed to water (a), acetone (b), methanol (c), ethyl acetate (d), and butanol (e) is approximately a factor of a million smaller than that to butylamine (f).

Additional Information

© 2000 American Chemical Society. Received 1 November 1999. Published online 29 February 2000. Published in print 1 March 2000. We acknowledge support from the Army Research Office (under a MURI grant program) and DARPA and thank Dr. C. R. Lewis for insightful discussions and suggestions during the conception and execution of this work.

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