Hi, Terry, I think I can get some citations from the scientific literature when my library re-opens on Monday, from particularly from Pillsbury and Hill's Argyria And The Pharmacology Of Silver (1939) and National Academy of Science's Spacecraft Water Exposure Guidelines.
In the meantime, I will respond partially. I didn't intend to say that making EIS with polluted water would only give ppb levels of silver. I meant that ppb levels can accomplish the sterilization before ppm are reached. I apologize if my wording did not reflect my meaning precisely. Silver citrate solution has been reported as causing argyria in at least case reported on this list. Granted, this is anecdotal and maybe even hearsay. For this reason I will not state specific names or manufacurers, though the archive search engine should pull it up. Launch on "silver citrate." Whether anecdotal reports constitute science can be argued either way, depending on one's definition of scientific method. I'll get back with further response on Monday. Thanks in advance for your patience. Best regards, Matthew
