It was crystal clear before adding, and somewhat foggy with a yellow
tinge after adding. I never got any noticeable precipitation.
Marshall
Norton, Steve wrote:
Tom,
What was the color of your solution before and after adding ascorbic
acid? Did the color change after the precipitated occurred?
Thanks,
Steve N
-----Original Message-----
From: poast [mailto:po...@prodigy.net]
Sent: Wednesday, March 17, 2010 9:10 AM
To: silver-list@eskimo.com
Subject: Re: CS>Making 100% colloidal EIS
Hello Marshall,
Some additional information...
My EIS ends up with a PH of 6.5. The solution that I added the ascorbic
acid to ended up with a PH of 3.5.
I know that some reactions are sensitive to PH, so an idea would be to
pick
a PH target and add only as much ascorbic acid as is needed to reduce
the PH
of the solution to the target value.
I used a "pinch" of ascorbic acid in 250 ml of EIS. I have measuring
spoons
that measure a drop, smidgen, pinch, dash, and tad. In liquid
measurement a
pinch is 0.3125 ml. I just measured a pinch of ascorbic acid and it
came in
at 0.31 grams.
Too much? Too little? Normal reaction?
Tom
----- Original Message -----
From: "Marshall Dudley" <mdud...@king-cart.com>
To: <silver-list@eskimo.com>
Sent: Tuesday, March 16, 2010 12:37 PM
Subject: Re: CS>Making 100% colloidal EIS
That is some good information. I was wondering if the addition of
ascorbic acid would cause 1 and 2 atom colloid, or if it would
precipitate out on the particles that are already there, that
indicates
that at least some of them precipitate out on other particles making
the
rather large. The other possibility would be that the remaining
ascorbic acid made the solution acid enough to make the colloid
unstable. I need to test and see if I neutralize the free acid if the
same thing happens.
Marshall
poast wrote:
Hello Marshall,
3 days ago I put a pinch of ascorbic acid in some EIS and have
stored
this
solution in a white 250 ml HDPE bottle. I took the lid off this
morning
and
noticed that some of the silver had precipitated out. I shook the
bottle
and it went back into solution.
There wasn't a large quantity, but against the white bottom it was
evident
that there was some.
I am using the SG6. My EIS comes out at around 15 uS, then settles
down
to
about 11.5 uS in a few days.
Tom
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