Cadmium-109 sources for trace analysis by X-ray fluorescence
Procedures for preparing109Cd sources suitable for use in trace-element analysis by the X-ray fluorescence method were investigated. Sources were prepared from109Cd in a 0.1N HCl solution by three different techniques: (a) electrodeposition of109Cd onto a silver plate, which was then enclosed in a silver housing; (b) electrodeposition onto a lead foil, enclosed in a lead housing; (c) sorption of the109Cd on a Permutit anionic exchange membrane, which was then enclosed in a silver housing. Using identical test conditions, the best results were obtained with the last-mentioned source, which was used successfully for the determination of Br and Pb in organic materials at concentration levels of ppm.
KeywordsAnionic Exchange Membrane Silver Plate Silver Foil Identical Test Condition 109Cd Source
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