Wrong D Glover! uS meters are very close to spot on. We had samples analyzed
about ten years ago and made the correlation at that time and started telling
about it. We have been selling the PWT meters ever since for that purpose.
TDS meters are not useful otfher than reading about half the PPM and not giving
much info about the water purity. They're the equivalent of litmus paper.
Trem
----- Original Message -----
From: D Glover
To: silver-list@eskimo.com
Sent: Thursday, January 12, 2012 12:40 PM
Subject: Re: CS>PPM vs uS
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 <asifnathe...@hotmail.com>
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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