At 12:37 PM 5/7/2012 -0400, you wrote:
Re: CS>bacteria
Ode Coyote
Mon, 07 May 2012 04:13:10 -0700
> I've gone as high as 87 uS...but it went deep yellow in a few days
> and eventually dropped back to 30 uS.
> PPM unknown, but well over 87.
> 25 to 30 uS is easy, but not generally very stable staying
> colorless...depends on the water mostly.
> Ode
Ken,
87uS down to 30uS is a 65% drop.
That is the worst case of contamination I have seen so far. I have
seen a 60% drop, but you have it beat by a mile.
## Absolutely not
It was simply far exceeding the solubility limits of the water, forcing
silver ions to make nonconductive molecules with whatever there is around,
namely, Oxygen in the air.
The yellow was simply suspended Silver Oxide, proven by its destruction and
clearing of the pigment after adding a bit of Hydrogen Peroxide.
Contaminated water CAN be a problem, and more of a potential problem the
higher you go past 30 uS where the conductivity rise rate at a constant
current goes nonlinear...but in that case it wasn't.
Ode
I will use your post as a reference from now on to show how bad it
can get.
The big question is where is it coming from. If it were sulfide, the
cs would be deep amber. So it has to be something else. One guess
might be interactions from the hematite stirrer. This material has
many crevices that can contain anything.
I don't know what else could be causing the contamination, but one
of the first things I will do when I get the SilverCell assembly
instructions posted will be to fire up the Silverpuppy I bought from
you, document the circuit in LTspice, modify it so I can take
measurements, and start running brews to find out what is going on.
I will of course post all the information I come across.
Thanks,
Mike Monett
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