Here you can be measuring concentrations a thousand times lower.

Then by some appropriate analytical method measure the concentration of "A".

In other words, the radius measures the concentration of the angles.

The concentrations measured can be compared with the appropriate exposure limits.

To measure the concentration, a beam of light is emitted into the air sample.

They went on to use the test to measure concentrations of vitamins, viruses and other substances in the body.

Used during fruit and vegetable processing to measure the concentration of sugar in a product.

They also exceed the concentrations measured in northern Chinese industrial cities.

This solution is then fed to a special machine which measures the concentration of lead and other metals in the sample.

It measures the "effective concentration" of a species in a non-ideal mixture.