Pat writes: > So what are the impurities if you have 99.9% pure silver? That > sounds pretty close to pure to me. Should I look for 99.99% pure? I > have to have two 6" by 1/2" for my CS machine..
We've discussed this many times over the years. <leans back in his rocking chair, thumbs under suspenders, spits toward spitoon> <grin> The general concensus is that 99.9% purity is sufficient. Four nines, 99.99%, is available for a bit more if you really want it. We looked into 99.999% (five nines) purity a couple of times and it is available from a few of the scientific materials supply houses like Aldrich or Alfa Aesar. The five nines stuff is expensive but not totally out of reach. Anything much purer than that gets to be pretty darned precious, at least for my budget! It helps to realize that if you're using 99.9% pure silver to make 10 parts per million silver sol, you'll have ... concentration x impurity fraction = impurity concentration .000010 x .001 = 0.000000010 ... or 10 parts per *BILLION* of total impurities. There are a few materials that can be toxic at such low concentrations, but you're not going to find them in pure metals. The major contaminant in silver is usually copper. Even if the fraction of impurities was *all* lead or mercury, for instance, you'd get many times more toxins drinking a glass of tap water than from all the CS you're likely to want to use. You're likely to have more impurities in your distilled water than will come from the electrodes. I hope that will give you some perspective on the purity question. Be well, Mike D. [Mike Devour, Citizen, Patriot, Libertarian] [mdev...@eskimo.com ] [Speaking only for myself... ] -- 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 Address Off-Topic messages to: silver-off-topic-l...@eskimo.com The Silver List and Off Topic List archives are currently down... List maintainer: Mike Devour <mdev...@eskimo.com>
