substoichiometric isotope dilution analysis

https://doi.org/10.1351/goldbook.S06081
A kind of
isotope dilution analysis
in which the final
isotopic abundance
is estimated from the amount of the
nuclide
present in a known quantity of the relevant element separated from the
test portion
, where this quantity is smaller than the total amount of that element present in the
test portion
.
Source:
PAC, 1994, 66, 2513. (Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994)) on page 2521 [Terms] [Paper]