DNAREFINING said:
Also I will be running white gold filled is it possible that they will contain pgms.
Per the underlined - yes it is "possible" - but that does not mean it's a sure thing
White gold is made by alloying gold with white metals that actually have the ability to "bleach" the yellow color from the gold thereby turning the gold white
in other words - it does not take a lot of the white metal to turn the gold white because a little bit of white metal actually bleaches the yellow from the gold
Not all white metals will do that - in other words - with some white metals it can take a lot of white metal to "wash out'" (or over come) the yellow color of gold --- silver is an example of this - silver will not actually "bleach" the color from gold - so it take a LOT of silver (alloyed with gold) before it washes out the yellow of the gold
Example; - if you alloy 75% gold with 25% silver you will not end up with white gold - you will just end up with a lighter yellow color of gold
On the other hand - platinum, palladium, & nickel are white metals that will actually bleach the yellow out of gold giving you a "gold" alloy that is "white" in color
Example; - it only takes (about) 25% of any
one - &/or combination of those metals to turn gold from yellow to "white"
So - as much as white gold "may" have PGMs (Pt &/or Pd) in it - it is also "possible" that only nickel (or mostly nickel) was used to make the white gold
In other words - not all white gold is created equal as white gold can be made with any
one of those metals &/or any combination of those metals
That is why testing is important :!:
One test you can do (before dissolving the white gold) is with a magnet - nickel is "very" magnetic - so if it (white gold) reacts to a magnet it is likely nickel white gold (or at least HIGH in nickel) - this of course depends somewhat on how strong the magnet is &/or how much it reacts with the magnet --- in other words its not an absolute test - but a test none the less
Once it is in solution (been dissolved) is when you want to do a stannous test (first) - if the stannous test indicates there is Pd in solution - you then want to confirm that with a DMG test
The best stannous test results (for the Pt &/or Pd) will be after you have dropped the gold - other wise the gold can over shadow &/or even hide the Pt &/or Pd
another test you can do -
after you have dropped the gold from the solution - is to dip the end of a piece of copper wire in the solution - if there is Pt &/or Pd in the solution the Pt &/or Pd will "plate" onto the copper leaving a silver/grey to black plating on the end of the wire --- again this is not an absolute test - but an indicator - so a stannous test &/or DMG test should be done after using this as a test
Links to other things I have posted about testing
:arrow:
Palladium precipitation
:arrow:
sodium chlorate - palladium process
There is a lot in this thread about testing - read the whole thread --- in this thread I posted links to other things about testing - including info on false positives - follow those links as well
once you understand the testing for Pt &/or Pd - & are able to confirm that you in fact have those metals in solution - we will then talk about getting those metal back out of the solution(s)
Kurt