Re: Silver solutions

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From:Jeffrey S Crews <>

While we're at it, could someone point me to a reference for simple
silver reclamation techniques? I understand that there is a way to
precipitate the silver in used silver staining and photo fixer solutions,
then pour off a silver-free supernatant. I believe it was on Histonet a
while back, but I don't know how to get to the archives, if they are back
up. Any help would be much appreciated. 

Jeffrey Crews, HTL (ASCP)
Organogenesis, Inc.

On Thu, 10 Feb 2000 15:47:54 +0000 "Marshall, Sharon,"
<> writes:
>Dear histonetters,
>Thanks to the net and John Kiernan I am nolonger as wary as I used to 
>be when working with Sat. picric acid.  I am interested to know how 
>other netters discard silver,ammonia and sodium hydroxide solutions 
>e.g. in Gordon and Sweet stain.  I neutralize the solution with 1% 
>sodium chloride and then flush it down the basin with a fair amount 
>of water.  (should I be doing this?)   In another lab. they collect 
>the waste solution in a plastic container  and then get a waste 
>company to collect it.   (is this a better alternative? I am 
>concerned about the explosive properties of this mixture when stored 
>in large quantities before collection. )
>Sharon Marshall
>Anatomy & Cell Biology
>University of Cape Town
>South Africa

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