On 10/04/2014 10:03 PM, Neville wrote:
Just a quick update on this. I decanted and cleaned that
container out *again* several days ago before returning
the solution to the container. Now here it is several
days later and that spot is reappearing - yet again! This
is truly bizarre? BUT...!! I think I have worked out
what's going on. Like an idiot I used litmus paper to
check Ph - but tested it in my storage vessel instead of
pouring a small amount into something else for testing.
I believe the paper has released something into the
solution. If paper is held in the water for just a
couple of seconds a blueish mist emanates from the paper
into the water, this would obviously now be a
contamination introduced into the water, this also I
believe is causing the milkiness as some form of compound
has now developed. I'm now in the process of doing some
back yard bush experimenting to isolate the problem.
Another update in a couple of weeks perhaps. Have to say,
if I stand on tip toe and stretch my arm really hard I
can just manage to touch the bottom rung of that
knowledge ladder <g>.
I don't have any knowledge of the chemistry of litmus paper
with silver water, but I like the way you are thinking about
this. I look forward to learning from your experience and
thinking.
Can you be any more specific about what you are using as
"litmus paper" is it the red/blue acid base indicator type
or the multi color type that gives more details about
acid/base strength? They use different chemistry.
Regardless, it is a useful observation that test papers can
contaminate the solution being tested.
--
Regards,
John Popelish
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