no carrier added

https://doi.org/10.1351/goldbook.N04174
A preparation of a @R05077@ which is essentially free from @S05900@ @I03331@ of the element in question.
Source:
PAC, 1994, 66, 2513. (Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994)) on page 2522 [Terms] [Paper]