The Radioisotopic labelling reference article from the English Wikipedia on 24-Apr-2004
(provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Radioisotopic labelling

Sponsorship the way you would do it
Radioisotopic labelling is the use of radioactive isotopes, commonly Carbon-14 in biological radioisotopic tagging, to measure the quantity of a substance composed of such an isotope by analysing its radiological activity.

This article is a stub. You can help Wikipedia by expanding it.