Solder from CPU pins

[Renaldas]

Got huge amount of such things after immersing ceramic CPUs directly in AR. Tell me, please, do they contain PM after have been for a long time in AR and how could i recycle them, if they contain PM?

Also noticed, that the same happens after processing CPUs for a long time in nitric. There are come solder left in the places where pins there attached, after processing it fell down as a tiny circles you see here in first photo.

 

[qst42know]

Have you read this thread?

http://www.goldrefiningforum.com/phpBB3/viewtopic.php?f=39&t=4753&start=0

If these silver braze circles have been in HCL, AR, or your nitric has some chloride contaminate they won't react to nitric anymore.

 

[lazersteve]

Check this thread also:

CPU Circles

Steve

 

[Renaldas]

Check this thread also:

CPU Circles

Steve

I appreciate all of you! How to you think, may these circles contain some precious metals in them or cemented on them, or I can discard them? Boiling them in AR + little sulpuric show no traces of PM testing with SnCl2, but maybe this is due to these metals reprecipitate back again?