[pure-silver] Re: Measuring low levels of silver in fixer
- From: Peter Badcock <peter.badcock@xxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Wed, 3 Feb 2010 09:52:21 +1100
Hi Ralph,
I'm not sure, but the film clearing time is about 6 minutes (when fresh it
is about 30-50 seconds) and the silver content is <1g/L. As I'm not a
chemist I can't explain why this would be the case. It is an Ilford Rapid
fix and from memory the pH was around 4-5 as displayed on the same tetenal
test strip.
I'm waiting to hear back from my water authority re. my proposed methods of
dealing with my spent fixer. I'll keep you posted.
rgds
Peter
On 2 February 2010 04:34, Ralph W. Lambrecht <info@xxxxxxxxxxxxxxxx> wrote:
> Peter
>
>
> I forgot to add that the reason I wouldn't necessarily do as Ralph
> suggested and use test strip to determine 1g/L then dilute to 50ppm is that
> I often leave my fixer out in a tray in my sink and the clearing time
> reaches unacceptably high values before the silver concentration will even
> reach 1g/L
>
>
> Why would that be?
>
>
>
>
> Regards
>
>
>
>
> Ralph W. Lambrecht
>
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