Ode, Thanks so much for this information, very helpful. In fact I've just saturated some ceramic candles with the gray solution, which based on what you've written I assume to be about 60ppm, accounting for the ion and the oxide. Actually, wanting still more silver I've saturated three times, quick drying in a hot oven between soakings. I can't think of any reason the heat would be deleterious. Can anybody? Afterwards we'll seal the candles closed and do membrane filtration tests for e coli. We'll also use some control candles, which contain no silver. Testing both groups of candles we'll hopefully be able to determine whether this kin d of silver oxide saturation can be effective. Reid
Ode Coyote wrote: Silver oxide is black to dark reddish brown. Metallic silver particles in high concentration may appear grey. The PWT ..ANY meter...only reads conductivity in microsiemens, some convert to PPM for you but the conversion applies to dissolved solids such as salt, not necessarily silver. A PPM meter reading should be doubled for silver ions. No meter registers on particles. The ratio of ions to particles is not a direct ratio. At 10 uS there may be 99% ions. At 20 uS that may be 80% ions and at 30 uS there may be 50 or 60% ions. So, at 30 uS you might actually have 60 PPM total silver. Many things can affect that ratio making it smaller or larger at a given conductivity and the meter won't tell the story. Observing the TE will give you an "idea" of what you have but no numbers. Sending the batch to a lab will give you numbers and someone elses 'idea' of what you have depending on how they did the measuring. An AA spectrometer is probably the best method going. Any method that depends on supplied solutions being accurate is suspect in my book. You just never know how good 'their' quality control is. Ode -- 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: [email protected] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
