New Tricorder Technology
Apparently this little gizmo developed by R. Graham Cook and his research group at Purdue is getting a lot of play on the web right now because someone associated the word tricorder with the story. Seems kind of silly, since this project has been underway at least since 2005.
As it turns out, the technology is not all that new either. The device is essentially a portable mass spectrometer, technology that goes back to the 1930's. Fairly light ones were later made so NASA could send them on space missions.
The real innovation here is not on the mass spectrometer itself but the ionization technology. In order to analyze an unknown compound you need to ionize it somehow, then send it through the mass spectrometer. Normally this is done at a very low vacuum, which is what makes a typical mass-spec system so big (vacuum pumps are bulky and heavy). This little puppy achieves ionization without need for a low vacuum.
For this reason, the CNet article may have it backwards in their opening paragraph - it's the ionized particles that are typically used in any mass-spec process.


