Abstract: STUDIES OF THE DETERMINING METHODS OF RADIOCHEMICAL PURITY OF RADIOPHARMACEUTICALS Jing Lie (Department of Isotopes, China Institute of Atomic Energy, Beijing 102413) ABSTRACT The methods is given summarily about the quality control of radiochemical purity of radiopharmaceuticals over the last twenty years in the Quality Control Laboratory, Department of Isotope. Some developments, such as the eliminating of adsorption of trace 198Au ionic in chromatography paper, are achieved. Key words radiopharmaceuticals radiochemical purity paper chromatography