Silver Listers, We have discussed the yellow tint many times on the list. I now believe after some amateur research into Silver Colloid texts the yellowing is due to silver lumps, anions, ions whatever the preferred term/s is -- is due to sliver sintered off during the brewing electrolosis -- being larger or above 30 Angstroms and this gives the yellow tint.
Forgive me if I'm off the mark and do correct me! In my own brewing I'm always pleased when my CS remains clear. Although along the way I've made my share of the 'yellow stuff" and consumed it anyway! Haven't game been enough to use H2O2 in my CS. Something to try sometime. Am familiar with H2O2's other great Oxygen therapy uses. I remain yours in SILvation, Douglas Haack Mike Monett wrote: > url: http://escribe.com/health/thesilverlist/m62773.html > CS>Half gallon brew > From: Dan Nave > Date: Thu, 25 Sep 2003 13:02:15 > > Hi Dan, > > I guess you are using fairly low current density, otherwise you > wouldn't see the gray sludge. You would be getting black silver > oxide instead. > > The gray sludge is formed at the cathode where silver ions have > picked up an electron to become atoms. These tend to surround > hydrogen bubbles that also form at the cathode. It makes a gray > sludge that can hang down from the cathode in small whiskers. > > I use the formation of these whiskers as an indication the brew is > finished. If you let it go much longer, the voltage across the cell > starts to flatten, which indicates the silver ions are forming gray > sludge, and also forming silver oxide in the Nernst diffusion layer > at both electrodes. > > The silver oxide, Ag2O, will combine to form larger particles that > give the cs a yellow tint. > > If you get a yellow tint to the solution, you can add a bit of H2O2 > to the cs and see an interesting reaction. Whack the electrodes > first to break the gray whiskers so they fall to the bottom of the > jar. > > Soon after you add the H2O2, the yellow tint disappears. This shows > the H2O2 acts as a catalyst to convert the silver oxide to ions: > > 2Ag2O + H2O2 --> 4Ag(+) + O2(g) + H2O2 > > You may start to notice bits of gray sludge rising to the surface, > then falling back down to the bottom. This is caused by the H2O2 > reacting with the pure silver to form ions and oxygen. The oxygen > bubbles make the gray bits rise to the surface, where the bubble > breaks and the bit falls back down. > > This reaction is quite different from the prevous one: > > 2Ag + 2H2O2 --> 2Ag(+) + O2(g) + 2H2O > > The H2O2 is consumed to form oxygen and water, plus silver ions. > This reaction is very slow, and it takes a lot of H2O2 to convert > even a tiny amount of pure silver to ions. > > I don't worry about the gray sludge. I just give the electrodes a > good whack before removing them from the solution so they fall to > the bottom of the jar. I leave them in the jar while transferring > the cs to another container, then dump them in the sink. > > The gray sludge is harmless if you happen to drink it. It is pure > silver and will simply pass through the body without interacting. > > 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: [email protected] > > Silver-list archive: http://escribe.com/health/thesilverlist/index.html > > List maintainer: Mike Devour <[email protected]>
