CSFriends, I've mentioned on several occasions that I'm a ceramist, and have developed a permeable pottery medium for low cost water purifiers. These are targeted primarily to the poor in southerly countries, who are vulnerable to water born illness. My question is: can someone tell me about lab tests for the presence of silver in water filtrate? I'm keen to know what options there may be beyond what a local lab is telling me. For example, are there simple ways of doing such a test?
I'm thinking that any such filtrate would probably be silver oxide. After saturating pottery purifiers with CS, when these dry the Ag+ takes on an electron and reacts with oxygen, ending up as silver oxide. To be sure this may have 10% the effectiveness of CS, but it seems that without drying, the silver will not become well situated. The test is needed because the EPA prescribes some maximum amount of silver in the filtrate. Proper behavior for a purifier would indicate that most of the silver that is not well situated will come off within the first hours or days of flow, a reverse exponential. Incidentally, my collaborators and I have been invited to attend the World Water Forum, expenses paid! So I'll fly to Kyoto mid March. That should be a great chance for exposure. Reid http://www.purifier.com.np -- The silver-list is a moderated forum for discussion of colloidal silver. Instructions for unsubscribing may be found at: http://silverlist.org To post, address your message to: silver-list@eskimo.com Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <mdev...@eskimo.com>
