[Radioimmunoassay for detection of hepatitis B surface antigen]

A modification of radioimmunoassay (RIA) for detection of HBsAg is described. The schedule for purification and the method of iodinization of purified HBsAg are presented. The sensitivity of RIA and other immunological methods for detection of HBsAg was analysed comparatively. RIA in the modification described detected HBsAg in a concentration of 50 mg/ml.