title: Liquid-scintillation counting of (57Co)--application to the radioassay of vitamin B 12.
mesh_terms: D001665:Binding Sites; D003037:Cobalt Radioisotopes; D005069:Evaluation Studies as Topic; D006801:Humans; D007437:Intrinsic Factor; D008722:Methods; D011485:Protein Binding; D011863:Radioimmunoassay; D012588:Scintillation Counting; D013051:Spectrometry, Gamma; D014805:Vitamin B 12 / Q000097:blood*
chemical_list: D003037:Cobalt Radioisotopes; D007437:Intrinsic Factor; D014805:Vitamin B 12