[pure-silver] Re: Measuring low levels of silver in fixer
- From: Russ Gorman <rusty57@xxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Sun, 31 Jan 2010 12:47:02 -0800
I would ask a local high school or junior college chemistry teacher to use it
as a class lesson to test ( perhaps with a reward or prize involved ) your
used solution in a known quantity, then use their results to apply to future
batches.
On Jan 30, 2010, at 11:35 PM, Peter Badcock wrote:
> Sorry for the cross post if any of you also read APUG, but I'll post
> conclusions to both lists.
>
> So I've searched APUG, pure_silver and the 'net but to little avail. Can
> folks please list me a few different inexpensive and relatively easy methods
> to measure/test when the silver in my (yet to be processed/recovered) fixing
> solution is below 50ppm ? Then my local government authority will permit it
> to be discarded down the drain.
>
> Some ideas include measuring the conductivity of the sol'n (assuming I am
> testing for dissolved silver). Also perhaps Colorimetry. No test strips will
> test such low levels of silver.
>
> rgds
> Peter
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