Each ferritin molecule consists of light subunit 19,000 dalton and heavy subunit 22,000 dalton. Twenty-four protein subunit about $440,000{sim}500,000$ dalton apoferritin which contained $20{sim}30%$ Fe as ferric hydroxyphosphate polymer form. Horse spleen-derived ferritin consists of 90% light subunit. These genetic characteristics of ferritin preparations were able to determine by cellulose acetate electrophoresis, but these ferritin preparations contained other components to be disturbed during refining, extraction and making finish products and have difficulties in deciding to be just. So, this study was performed to establish the scientific method for determine the quality of ferritin preparations with immunodiffusion methods which has high specificity between heterogeneous proteins.