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American Chemical Society's Weekly PressPac -- March 5, 2008


Sniffing out uses for the electronic nose
Chemical Reviews

Despite 25 years of research, development of an electronic nose even approaching the capabilities of the human sniffer remains a dream, chemists in Germany conclude in an overview on the topic. Their review of R&D on digital noses is in the current issue of ACS monthly journal Chemical Reviews.

In the article, Udo Weimar and colleagues describe major advances that have produced olfactory sensors with a range of uses in detecting certain odors. Electronic noses excel, for instance, at picking up so-called non-odorant volatiles chemicals that mammalian noses cannot pick up like carbon monoxide. Ideally, however, an electronic nose should mimic the discrimination of the mammalian olfactory system for smells reliably identifying odors like fruity, grassy and earthy given off by certain chemicals. Until electronic noses become more selective, their roles probably will be limited to serving as valuable tools for tasks such as monitoring air quality and detecting explosives.

The electronic nose has the potential to enter our daily life far away from well-equipped chemical laboratories and skilled specialists, the article states. Keeping its limitations in mind and adapted for a special purpose, this will be the future for the electronic nose for as long as the ability to smell odors rather than detect volatiles is still far away over the rainbow. AD

Electronic Nose: Current Status and Future Trends


Udo Weimar, Ph.D.
University of Tbingen
Tbingen, Germany
Phone: +49-7071-29-77634
Fax: +49-7071-29-5960

Contact: Michael Woods
American Chemical Society

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