title: Vitamin B12 determination by means of radioisotope dilution and ultrafiltration.
mesh_terms: D000818:Animals; D001681:Biological Assay; D003036:Cobalt Isotopes; D003486:Cyanides; D005055:Euglena; D005374:Filtration; D006358:Hot Temperature; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D007437:Intrinsic Factor; D008722:Methods; D009994:Osmolar Concentration; D011485:Protein Binding; D011865:Radioisotope Dilution Technique; D014805:Vitamin B 12 / Q000097:blood*
chemical_list: D003036:Cobalt Isotopes; D003486:Cyanides; D007202:Indicators and Reagents; D007437:Intrinsic Factor; D014805:Vitamin B 12