Radioaktiv mærkning af bærermolekyler såsom monoklonale antistoffer, peptider eller andre substrater med yttriumchlorid (90Y) er meget følsom over for tilstedeværelsen af spormetal urenheder.
Radiolabelling of carrier molecules, such as monoclonal antibodies, peptides or other substrates, with Yttrium (90Y) chloride is very sensitive to the presence of trace metal impurities.