Physorg.com -- Researchers in Indiana are describing development of the world’s smallest complete mass spectrometer (MS), a miniature version of a standard lab device — some of which would dominate a living room — to identify tiny amounts of chemicals in the environment. The hand-held MS, about the size of a shoebox, could speed the detection of bioterrorism agents, hidden explosives, and other threats, the researchers say. Their study is scheduled for the current issue of ACS’ Analytical Chemistry.