A @T06422@ in which the @L03424@ is present mainly in a specified position.
Source: PAC, 1994, 66, 2513. (Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994)) on page 2526 [Terms] [Paper]
Citation: 'nominally labelled tracer' in IUPAC Compendium of Chemical Terminology, 3rd ed. International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. https://doi.org/10.1351/goldbook.N04178 RISBibTexEndNote