No intrusion Frank.
Just had a light bulb moment! I believe I see what Tom was referring to about
'scale inaccuracies'. Temperature could affect the accuracy of the scales
{digital} which could result in differing weight readings? I can only assume
scales of this nature would have a spring or such operating it, therefore the
tension or compression of that spring would change with air temperature, and in
measuring on such a small scale as this, ie, down to 0.001g, it would make it
difficult to get any accuracy at all...Yes/No? If one were to do this with any
degree of accuracy one would need to use a 'balance' scale, whilst trying to
maintain a constant water temperature.
You've got me thinking now though. The SG of water changes with temperature
doesn't it? Which means the weight of the solute may not change, as you say,
but the weight of the water would...Yes/No? If this is the case, then in
effect I'm measuring the weight of water more than anything else...Yes/No?
Sorry, but I think it best if I back out of this now cos I'm no physics
professor and I'm going to rapidly get out of my depth here. Praps *I* was the
one intruding in the first place <g>.
Still, I guess I learnt something from it...the scales go back in the cupboard!
N.
From: [email protected]
To: [email protected]
Subject: Re: CS>Wet weight?
Date: Sat, 26 Feb 2011 08:49:32 -0500
Hi guys Forgive me for intruding but .....The best analytical balances have a
sensitivity of 0.0001 gm. and an accuracy of +-0.0002. If you are adding 5
parts per million of a compound with a specific gravity of 11 (silver) to a
liquid with a Spg of 1.0 (distilled water) , how do you expect to pick up the
difference in weight?
Weight does not change with temperature. Only the volume does.
Whether you “cluster” ions or not their weight does not change.
Vortexing water will not change the weight. But if you introduce air, for
example, you are changing the density and that is another matter.
Keep in mind that weight is a direct reflection of mass and mass does not
change with temperature, vortexing, etc.
Hope it helps
Frank
From: Neville Munn
Sent: Friday, February 25, 2011 7:47 PM
To: [email protected]
Subject: RE: CS>Wet weight?
I'm fairly confident the measurements are right. I went through the same
exercise this morning and although measurements are different today from
yesterday the scales DO pick up differences in weight, of that I have no doubt.
However, I suspect this is not a successful way of doing things due to several
factors just off the top of my head:
a) Temperature of medicine cup may increase with manual handling, which in turn
will heat water/solution contained within {can only afford to do the procedure
once}?
b) Although temperature of EIS is the same today as yesterday the plain DW may
not be? {failed to measure plain DW temperature and used DW temp from yesterday}
c) Water temperature may rise during the time measurements are taken. {again,
manual handling of cup, containers, syringe and day temp rising praps}
d) There may be some weight differences between Ag ions and ion cluster
characteristics which may be influencing results? *this is probly an unknown*
e) I have been vortexing the water prior to production in recent batches.
Would now need to make a few batches without vortexing the water and see what
difference there is...if any? {probly won't bother as I don't think my weighing
exercise was of any use}.
Although the scales do pick up differences in weight I don't believe this
method is at all useful due to aforesaid factors. I say this because as an
example, the medicine cup weighs more today than yesterday {room temperature
may be heating things a tad?}. Just too many external influences and variables
that can affect results to be of any practical use.
The idea seemed good in principal, but I don't think it works in practice,
nevermind, if one never never goes one never never knows. If nothing else it's
made me question any possible differences there may be between weight
characteristics of Ag ions in solution and ion clusters {particles} in
solution...if any?
N.
Date: Fri, 25 Feb 2011 11:20:53 -0500
From: [email protected]
To: [email protected]
Subject: Re: CS>Wet weight?
How confident are you of your measurements? Basic chemistry says that water
with silver in it should have a density which is higher, not lower than
distilled water. However there have been a number of reports that nanosilver
structures water, sort of like homeopathy. If that is the case, then any
restructuring, or crystalization of the water would be expected to have an
effect on the density. If your measurements are indeed correct, this may be
confirmation of those reports.
Marshall
