In a message dated 6/22/00 8:09:51 AM EST, i...@win.co.nz writes: << Roger, I can't find the reference just now, but I believe rather than having a DC across the electrodes causing the electrophoresis of the particles in the solution, an AC current of fairly high frequency is used, which keeps these particle pretty much jiggling in place and avoids the plating out which would otherwise occur. If you leave such a meter sitting in the solution some plating out is inevitable, which may distort the reading. Ivan: I believe your comments were intended to explain why using a conductivity meter for measuring CS concentration would not produce inaccuracies by having silver plate out as long as the CS were removed after a reading and the cup flushed with DW. However, part of your commentary sounds very much like my HVAC setup to make CS,
"...an AC current of fairly high frequency is used, which keeps these particle pretty much jiggling in place and avoids the plating out which would otherwise occur." So, having a voltage/frequency ratio close to one and not 150 as Marshall has suggested seems acceptable as long as the frequency is high enough. Perhaps even 60 Hz should be high enough. If 60 Hz. is OK, wouldn't ~12000 Hz. do the job -- at ANY voltage? Any thoughts? Roger -- 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>
