With trace quantities of Hydrochloric acid vapors in the air, your kitchen is no longer an easy case.

Room 405 was the site where, for the first time, a trace quantity of this new element was isolated and measured in September 1942.

These deposits also have trace quantities of gold and mercury.

On August 18, 1942, a trace quantity of this element was isolated and measured for the first time.

But it's only present in trace quantities- and it doesn't replicate very quickly, so it can't produce much of the poison.

It has been investigated for possible medicinal use in trace quantities without success.

Many other natural oils, for example peppermint oil, contain trace quantities of carvones.

These compounds must be absorbed, or eaten, but typically only in trace quantities.

This leaves about three times more hydrogen than helium-4 (by mass) and only trace quantities of other nuclei.

Distilled water will also normally contain trace quantities of air, which contains CO2.