Hi James,
Sorry to disagree. I had a few samples analyzed by the atomic absorption
method and the readings correlate almost directly with PWT readings. If
the samples were digested first in aqua regia, then the readings taken with
the PWT were about 45% lower. That would correlate with readings done on
a spectrophotometer.
I prefer to believe the independent lab results over the Hanna
recommendation. In any case the PWT reads almost right on or 45%
high. It's still quite repeatable. So just choose your belief system:
atomic absorption or spectrophotometer.
I also subtract the uS reading of starting water before the calculation.
Trem
www.silvergen.com
At 09:28 AM 6/3/00 -0700, you wrote:
Somebody said...
I just made a batch of Colloidal Silver..I measured the distilled water with
a Hanna PWT meter at a reading of 2...I let it brew for 55 minutes..cleaning
the silver every 15 minutes or so. my electrodes are 1.5 inches apart in 8
oz jar..The PWT meter now reads 28.5 what PPM do I have?
And I say...
Well, I'm not Ivan, however, I do have an answer to your query. With the
Hanna PWT, you need to divide the number of ppm's that are showing by 2 in
order to get a true and accurate portrayal. With your example, you started
with 2ppm and ended with 28.5 so first we subtract 2 from 28.5 leaving us
with 26.5 and then we divide 26.5 by 2 leaving us with a sol of 13.25ppm (or
thereabouts).
This is the information that I got direct from my Hanna rep. so I'm pretty
sure it's correct.
Yours in health,
James Allison
---------------------------------------------
Allisons Apothecary - Your On-Line Apothecary
Visit Us Soon - http://allisonsapothecary.com
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---------------------------------------------
----- Original Message -----
From: Alvin Rose <ar...@nf.sympatico.ca>
To: <silver-list@eskimo.com>
Sent: Saturday, June 03, 2000 1:46 PM
Subject: CS>PPM
> Hi Ivan
> Thanks....... Alvin Rose
>
>
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