The first devices were primitive field alarms to detect chemicals.

It also cannot reliably detect chemicals that are not explosive but become so when mixed.

To give you an example, marine biologists can take water samples to detect various chemicals or salt levels in the water.

"We will be training them to detect chemicals and to decontaminate troops and equipment."

Based on research into laser spectroscopy, he is developing a sophisticated system for detecting chemicals in the environment.

The Americans were not alone in detecting chemicals.

They can detect chemicals at concentrations as small as a few parts per billion.

The second, lower pair are used to detect chemicals.

He knew the dog could detect and withstand noxious chemicals, but a June shower was another matter.

Different pieces of dust could be tagged to detect different chemicals.