Hi list,
You can also prove that what you have in suspension is silver by
precipitating it with diluted hydrochloric acid.
1/ Obtain diluted HlC acid by mixing concentrated Muriatic acid (trade
name for hydrochloric) with water by mixing one part of acid with eight
parts of distilled water.
2/ Place the solution in an eyedropper
3/ Prepare two glass containers (drinking glasses OK) one containing the
silver suspension and the second one distilled water. Both liquids
should be perfectly clear.
4/ Add four-five drops of acid to each glass.
5/ After a minute or so, and in a somewhat darker room, apply a
flashlight to each glass and if silver is present you should appreciate
a cloudiness, while the control should remain clear. This cloudiness is
silver chloride which is a white compound insoluble in water.
6/ The cloudiness will be very faint because we are looking at a few ppm
but once you become trained, particularly on how to control ambient
light, you will see the precipitate.
Regards
Frank ND
Neville Munn wrote:
Hi there David,
The point I was making was that if one has a reading of water BEFORE
production one will know there is silver present AFTER production,
just a simple indicator for us punters is all, if the reading doesn't
go up then I'd reckon there won't be much silver present.
[handheld meter is such a poor tool for measuring ppm]
-Yep, agreed, meters are only a rough guide, but a guide nonetheless,
and the BEST guide the punter has, at least they indicate SOMETHING is
in the water besides water, and if you START with DW then you can be
pretty much sure it's mostly silver that's gunna be in that DW at
the END of production.
[subtracting the initial ppm is rather pointless anyway]
-Yep, agree with that too, but for some of us it gives a sense of
security or knowledge of the product we produce without having a
diploma in chemistry, allow us our illusion of pretending to know what
this stuff is all about, as I allow others the illusion they
know what this stuff is all about. There's plenty of room for
learning more about EIS as far as I'm concerned, both for punter and
academic.
N.
> From: [email protected]
> Date: Fri, 25 Sep 2009 14:33:54 +0930
> To: [email protected]
> Subject: CS>How to gauge one's CS solution
>
> I would dispute the need to subtract the initial DW reading. When
> you make a batch the silver ions will combine with the ionic
> impurities that are already in the DW to form non-conductive
> particles that are not readable by the meter. So, in effect, the
> initial DW reading is automatically taken out of the equation. If
> anything I'd suggest you read the meter then ADD the initial DW
> reading to give yourself a VERY rough idea of the TOTAL ppm. (i.e.
> ions plus colloids). If you are using a TDS meter then you should AT
> LEAST double what it says on the meter . If you want a TOTAL ppm
> measurement my guess is that you should do this about 6 hours after
> making the batch.
>
> But of course a handheld meter is such a poor tool for measuring ppm
> that subtracting the initial ppm is rather pointless anyway. The tool
> is simply not accurate enough to bother with such minor details.
> (Unless of course the water is very impure then you might as well
> just forget about using a meter at all.).
>
> Regards
> David
>
>
> >
> > From: Neville Munn <[email protected]>
> > Date: 25 September 2009 9:06:00 AM
> > To: <[email protected]>
> > Subject: RE: CS>How to gauge one's CS solution
> >
> > The meter is telling you you have silver...if it's only silver you
> > put in the water it's only going to be silver the meter is
> > reading...after you do the subtraction thing from initial DW
> > reading before brewing.
> >
>
>
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