Hey Bob. You might give this a try. Use constant voltage AND current with stirring. Basically make it so the electrodes can be removed from the water incrementally, and slowly pull the electrodes out of the water as current tries to increase. Once calibrated you could make CS of whatever ppm you want by marking on the container at what point the electrodes are at when you finish.
Here is my thinking. Increasing voltage, with all else unchanged, tends to reduce particle size because the higher gradient pulls the particles away from the anode more rapidly so the ppm does not build up as much near the anode. Higher current increases particle size, due to increase in particle density near the electrode. That one reason that if you use constant voltage the particles tend to get large rather quickly once the current reaches a certain point. But if you use constant current, the voltage still drops off toward the end. This I believe will increase particle size more than if the voltage could be maintained with the same current. That can be accomplished by removing active area from the water. Now, it is true that the current density will go up as you extract the electrodes, which should make larger particles. However the voltage distribution between the electrodes goes from being almost linear between the electrodes, to having the highest gradient near each electrode, because the electrode area has dropped, and the bulk conductivity of the CS has gone up. I believe this increased gradient near the electrode will more than compensate for the higher current density. Anyway, you might want to give it a try. I don't know about LVDC, but it seems to work that way with HVAC. Marshall -- The silver-list is a moderated forum for discussion of colloidal silver. To join or quit silver-list or silver-digest send an e-mail message to: silver-list-requ...@eskimo.com -or- silver-digest-requ...@eskimo.com with the word subscribe or unsubscribe in the SUBJECT line. 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>
