radionuclidic purity

https://doi.org/10.1351/goldbook.R05117
For a material, that fraction of the total @A00114@ which is present in the form of the stated @R05116@, including @D01525@.
Source:
PAC, 1994, 66, 2513. (Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994)) on page 2523 [Terms] [Paper]