Word: sniffers
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Dates: during 1970-1979
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...from scratch. Much of the know-how has already been accumulated by a Chicago lab called the Olfactronics and Odor Science Center, part of the Illinois Institute of Technology Research Institute. Under a $300,000 grant from the Federal Aviation Administration, the smell researchers have developed a prototype "bomb sniffer" that scents incriminating odors with all the dispatch of a highly trained bloodhound. In fact, the system has so impressed the Israelis that they have adapted and improved the design for their own harassed airliners, though they have not officially acknowledged the use of such a detector...
Golden Tube. The target of the chromatographic detective work performed by the bomb sniffer is the vapor from a chemical called ethylene glycol dinitrate (EGDN), one of the principal components of emissions given off by dynamite. With the aid of a small internal fan, the detector samples air in the vicinity of a suspect object and passes the vapors over a modern equivalent of Tsvett's limestone-a rough gold-plated copper surface that has a special affinity for EGDN. As the molecules adhere to it, their concentration increases. The special surface is then heated...