A new radioiodine exchange labeling technique.

A new technique of radioiodine exchange labeling is presented. The method was developed with respect to the short physical half lives of 123I and 121I, the altered activity concentrations and varying impurities, which hamper the previously introduced labeling methods. The described "one step reaction" is applicable to a series of organic compounds with different physicochemical and physiological behaviour as well as to all radioisotopes of iodine.