A measurement in which the @A00114@ of a @T06284@ is derived from the ratio between the @C01370@ rates observed for the @T06284@ and for a @R05088@ of known activity.
Source: PAC, 1994,
66, 2513. (
Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994)) on page 2525 [
Terms] [
Paper]