Non-Chemical To be or not to be inquarted

[machiavelli976]

Hello everyone ! Just need some advice about the button below.
This is a 10.69 grams , recovered from some old plated watches and eye glass frames. (I've melted the foils to enjoy the color )
I'd like to know some of your opinions about how should i treat this button . Should I inquart it first or direct digest in AR ?
Since I've recovered about one ounce and the other buttons prepared for refining are already recovered by inquartation , what would you do with this one?

Thanks in advance, Mach.

 

[Barren Realms 007]

Use it in your solution when you have use too much nitric.

 

[machiavelli976]

Thanks Barren , but i have already done small scale refining and i know how to not waste the nitric. I like to drop it little by little over the warm HCl.
And I'm not afraid of boiling either.

 

[Oz]

The only useful reason I can think of to inquart this button would be if you suspected platinum group metals as a contaminate. Inquartation with silver is a very good method of removing traces of PGMs from gold in your nitric digest.

If you do not have PGMs I would just redigest it in AR and precipitate.

As to your lack of fear in boiling. If you are referring to triple evaporation to remove nitric you should avoid actual boiling (just evaporate) in order to minimize loss of values.

 

[machiavelli976]

Thanks Oz , I don't really suspect any PGM's due to golden color of all the items being de-plated .
Now , because of what you are telling me , i realize i was total ignorant about the white covering of many many eye-glass frames.
Have anyone encounter platinum group metals on them? Further more, what about white gold plated or filled stuff?

You was right about boiling. I actually meant evaporating. My lack of english must be the reason. Thanks anyway, Mach.

By the way , congrats for becoming moderator; there was the green glow of your user name scratching my left eye :lol: . Have seen it a little later :mrgreen:

 

[samuel-a]

Now , because of what you are telling me , i realize i was total ignorant about the white covering of many many eye-glass frames.
Have anyone encounter platinum group metals on them? Further more, what about white gold plated or filled stuff?

White GF stuff and karat jewelry may very well have Rh plating as a finishing touch. did you noticed tiny silvery particles floating around after base metals dissolution?

Pt/Pd may as well be present in the white gold alloy it self.

Oz suggestion is spot on in case Pt is present, by alloying it with silver one is able to dissolve the Pt with nitric acid leach along side the silver leaving the gold on the bottom.