title: Electrophoretic analysis of different technetium-99m (SnCl2) methylene diphosphonate complexes.
abstract: Technetium-99m MDP was prepared from MDP kits from several different sources. The resulting [99mTc]MDP preparations were analyzed by electrophoresis. The results demonstrated the presence of at least four different 99mTc complexes in these preparations. Modified kit preparations were analyzed to show the effects of concentration and pH on formation of the impurities. The electrophoresis results were correlated with scintillation camera imaging studies in rabbits and suggest that hydrolysis of MDP to phosphate and methylphosphate results in formation of 99mTc complexes with poor biological behavior as bone scanning agents.
authors.forename: A
authors.initials: A
authors.lastname: Najafi
authors.forename: N
authors.initials: N
authors.lastname: Hutchison
mesh_terms: D000818:Animals; D001842:Bone and Bones / Q000000981:diagnostic imaging; D004164:Diphosphonates / Q000032:analysis; D004586:Electrophoresis; D006863:Hydrogen-Ion Concentration; D011817:Rabbits; D011877:Radionuclide Imaging; D011933:Reagent Kits, Diagnostic / Q000592:standards*; D013667:Technetium / Q000032:analysis; D013669:Technetium Tc 99m Medronate
chemical_list: D004164:Diphosphonates; D011933:Reagent Kits, Diagnostic; D013667:Technetium; D013669:Technetium Tc 99m Medronate