Abstract
A method for measuring the unsaturated iron-binding capacity of serum using radioactive iron with magnesium carbonate as the adsorbing substance is described. The radioactive iron-magnesium carbonate method, compared with the methods of Caraway (1963), Herbert, Gottlieb, Lau, Fisher, Grevirtz, and Wasserman (1966), and Bothwell, Jacobs, and Kamener (1959), was shorter and simpler and equally reproducible.