Cyanide is not needed in the cresolphthalein complexone determination of serum calcium.
D001322:Autoanalysis; D002118:Calcium / Q000097:blood*; D006801:Humans; D008670:Metals; D011190:Potassium Cyanide; D012016:Reference Values
D008670:Metals; D011190:Potassium Cyanide; D002118:Calcium