So far as I know, the electron microscope has fallen out of favor for this purpose. This is the way I understand why:
Since an electron microscope requires a dry sample and ionic silver oxidizes when dried you won't get a good count on metallic particles. What you will get is clumps and clusters of silver oxides that look like particles but bear no relationship to what is being looked for. The Malvern Particle sizer works using the properties of light in unaltered samples. Frank Key is the only person I've run across that seems to know what's going on where single metals colloids and free ions are concerned. Ode At 06:27 PM 7/30/2004, you wrote: >David: >As I said I would, I spent a couple hours on the phone today to labs that can check silver. > >For 15 to 20 dollars they will check for PPM. The big expense comes when checking particle size with an electron microscope. Do you make your silver with low voltage DC or high voltage AC ? When I was making it with lvdc I used a Hanna TDS meter. Now that I use only hvac it can't be used to test for PPM. I plan to send it to one of the labs I spoke to today for PPM only. > >Bill Amos >-------------------------------------------------------------- >Can anyone recommend a good place to send samples of my CS to get the true PPM, particle size, and whatever >other info is pertinent? Thanks in advance! > > >-- >The Silver List is a moderated forum for discussing Colloidal Silver. > >Instructions for unsubscribing are posted at: http://silverlist.org > >To post, address your message to: silver-list@eskimo.com Silver List archive: http://escribe.com/health/thesilverlist/index.html > >Address Off-Topic messages to: silver-off-topic-l...@eskimo.com OT Archive: http://escribe.com/health/silverofftopiclist/index.html > >List maintainer: Mike Devour <mdev...@eskimo.com> > >
