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[en] A chemical separation based on the fixation of silver on nickel ferrocyanide was studied. It was applied to the determination of lead in silver by photon-activation or atomic absorption spectrometry. The first method gave a detection limit of 0.1 μg. The second one could not be applied for concentration less than 50 μg/g, owing to loss by adsorption. Analytical results showed that lead is one of the major metallic impurity in high purity silver. (author)
Journal
Radiochemical and Radioanalytical Letters; ISSN 0079-9483; 
; v. 36(1); p. 13-19
; v. 36(1); p. 13-19