isotope dilution

https://doi.org/10.1351/goldbook.I03322
Mixing of a given nuclide with one or more of its isotopes.
Source:
PAC, 1994, 66, 2513. 'Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994)' on page 2521 (https://doi.org/10.1351/pac199466122513)