It would help if you knew what the other 1% is.  If it is mercury, arsenic
or lead, stay away from it. If it is copper and/or gold, then by all means
it would be fine.

I believe nickel would also not be too much of a problem as long as the
water is not highly acidic.

Marshall

Reid Harvey wrote:

> Silver Friends,
> I am soliciting the opinions of the knowledgeable here as to the purity
> requirements of silver electrodes, for use in making concentrated CS, of
> the type that would be used to saturate ceramic water purifiers.  This
> CS would not be recommended for ingesting, only used for water filter
> saturation immediately after production.  I am well aware that three
> nines (99.9%) is minimal purity for CS that is ingested, what about two
> nines (99.0%) for the purpose of saturating permeable ceramics?  What
> about less than 99.0%?
>
> The purifiers are to be for the use of low income people, for whom low
> cost of the system is all important.  My impression is that 99.9% silver
> may be double or triple the price of 99.0%.  From what I'm seeing here
> in South Asia it is not difficult to insure 99.0% purity for locally
> processed silver electrodes.  But 99.9% must be imported.  So this is
> much more expensive, particularly in ensuring the additional step of
> rolling an ingot into an electrode.  I'm also of the impression that the
> major impurity in the silver may by copper or nickel, metals that would
> also become situated in the purifiers, not flushed into the filtrate.
>
> What do you think?
> Reid
>
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