Asif, don't waste your time with uS meters except for testing the purity of
your water, as they were only designed for that purpose, and nothing
more, they cannot in any way measure ionic content of silver sol or be used
to infer any value for ppm of silver ions in a sol  through extrapolation
by some mathematical means.  No matter how you play with maths you will not
get a proper answer. Rather, standardize your method of manufacture (for
some tips please see my essay on the manufacture of silver sols at
Mothman777's Blog')
Make some 20 ml specimens and submit those to a professional lab
(university labs are cheapest), they will dissolve all the clusters of ions
into single ions with the addition of nitric acid, then a fine vapour of
this is aspirated under pressure into an argon plasma flame at a high
temperature and the colour of the spectrum will tell you accurately what
you have made, but bear in mind that 10 ppm might all be in a small number
of a few thousand clusters (for example) or might be in trillions of
clusters.

On Thu, Jan 12, 2012 at 9:47 AM, Asif Nathekar <[email protected]>wrote:

> Hi,
>
> I have been doing some more reading which has got me looking for a
> resolution, namely what uS do you consider to roughly figure out the PPM.
> I know the reason why a typical ppm or uS meter would not give a reading
> due to the ions which we do want to measure not being very measurable in
> terms in electrical conductance.
> But it there a rough method to measure from the stuff that does conduct.
> What I am therefore asking is if my uS meter says 10 uS what ppm of CS
> should I consider that to be.
> I have so far been halving the value so  that I would have said that was 5
> ppm. This was from information I received from other posts.
> Kindly help shed some light in this matter for me.
> Cheers
> Peace to all
> Asif.
>
>
>
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