The determination of Br,Ag and I in pharmaceuticals using X-ray fluorescence excited by gamma sources

The possibility of using γ-radiation sources for the X-ray fluorescence analysis of Br, Ag, and I was studied on model samples. The results were applied for the determination of these elements in pharmaceutical products. The optimum channel range was selected and the accuracies obtainable with various types of radiation sources were compared. For routine analysis of pharmaceutical products and other substances of similar composition, the most suitable radiation sources are:¹²⁵I for the determination of low concentration of bromine;¹⁵³Gd for the determination of silver; and²⁴¹Am for that of iodine.