title: Preparation of 125I-thyroxine and 125I-triiodothyronine of high specific activity for the radioimmunoassay of serum total T4 and T3.
abstract: A simple and inexpensive procedure for the preparation of high specific activity 125I radioiodinated triiodothyronine and thyroxine is described. The specific activities achieved are approximately 350 Ci/g for 125I-T4, and either 200 Ci/g for 125I-T3 depending on the reagents employed. The high specific activity 125I-T4 and 125I-T3 are suitable for the routine radioimmunoassay of serum total T3 and T4. When properly stored they have a self life of at least seven weeks.
mesh_terms: D003429:Cross Reactions; D004355:Drug Stability; D005069:Evaluation Studies as Topic; D006801:Humans; D007457:Iodine Radioisotopes; D007467:Iodoproteins / Q000138:chemical synthesis*; D011863:Radioimmunoassay / Q000379:methods; D013974:Thyroxine / Q000097:blood; D014284:Triiodothyronine / Q000097:blood
chemical_list: D007457:Iodine Radioisotopes; D007467:Iodoproteins; D014284:Triiodothyronine; D013974:Thyroxine