Dan, Mike, Ode, Thanks for all this, and now I feel I'm on my way. How depressing, that momentary fear I had only 24ppm! Dan, I highly appreciate your idea of weighing the annode, but appear to have two two of these, in as much as there's a lot of polarity switching, so I've got to weigh both electrodes. Some time ago someone suggested weighing precipitate, and I'd thought of doing this after inducing it with light and electromagnetic field, like a fan or whatever. But this is messy and wastes good CS. Reid
Dan Nave said, > Reid, > All things considered, since you are in Nepal and you are making > large quantities of very high ppm CS, I think the easiest and > cheapest way of determining the ppm of the solution would be the > method recently suggested by Mike Monett to actually weigh the > silver anode at the beginning and at the end of production and > then calculate the ppm based on the weight of silver lost and the > volume of water of the resultant CS. > You should be able to make a large quantity of CS (several runs > over a period of time) and combine the resultant brews and come up > with enough silver weight loss on the anode to get a faily > accurate calculation. Any reasonably sized town in Nepal will have > chemists, pharmasists, or labs who would have a tripple beam > balance which would probably give enough resolution for this. Just > be sure to use the same balance to weigh the before and after > weights. > I'm sure that Mike or someone on the list would be able to give > you formulas with which to make this calculation. > Dan > PS You lucky guy! I love Nepal... Brilliant Idea, Dan. The formula is simple. ppm = mg / litre The conversion program you posted recently would be excellent for converting between the different units. The newer electronic balances can measure 1 milligram in several hundred. A good pharma distributor should have one and might let you use it. I'd strongly recommend using a constant current source to control the current. Running with constant voltage will give highly variable results due to the variations in cell conductance with changing ion concentration. The high current density you are using produces a high cell resistance. With the current you are running, the voltage across the cell probably exceeds the 37 Volt limit of LM117's. I recently posted a high compliance current source for cell voltages up to 160VDC that might help get the repeatability you need. Please see http://escribe.com/health/thesilverlist/m61896.html http://escribe.com/health/thesilverlist/m61938.html You will need a good heat sink to run above about 12mA. Good thinking, Dan. You have an excellent analytical mind. Best Regards, Mike Monett -- 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>