ABSTRACT
Detection technology is an exciting subject. For hundreds of years, people have sought out tests that could confi rm the presence or exclusion of a substance.
An accurate fi eld test for gold saved a lot of prospectors from wasting their time on fool’s gold in the late 1800s. A simple Geiger counter was the technology necessary to discover radioactive material that fueled the atomic age. And who would have thought the U.S. Postal Service would need a test for “white powder?”
