Significant Amounts Of Silver Research Articles

Adsorption and decomposition of silver diammine complexes on carbon surfaces

The adsorption of silver diammine complexes on carbon surfaces has been investigated. Well-characterized carbon supports with known active surface area have been used. The silver complex is adsorbed on edge carbon sites which are part of the active surface area. Once adsorbed the complex decomposes and forms metallic silver aggregates. The reduction of the silver cation to the metal occurs by consumption of a part of the ammonia present in the complex. A significant amount of silver can be deposited on a carbon by this method.

SILVER IN THE URINE

<h3>To the Editor:—</h3> We have read the communication by Dr. Joseph C. Aub and Dr. Lawrence T. Fairhall (The Journal, Jan. 24, 1942, p. 319) in which the view is expressed that silver is not excreted in the urine. Since the comparatively non-strategic nature of silver has encouraged its industrial use during the emergency to replace some of its lowly but more essential metallic relatives, the subject of silver pharmacology may assume greater importance. We wish to call attention to our report of a case of obscure argyria with argyremia (The Journal, Nov. 17, 1934, p. 1521) in which it was demonstrated spectrographically that under certain conditions, at least, significant amounts of silver may be eliminated from the body by excretion in the urine even three months after the cessation of silver ingestion. However, in an old case of well pigmented argyria in which there had been no abnormal silver