Hi, I precipitated Pt and Pd from aqua regia using Ammonium Chloride. I then had PGM powder(32%Pt, 1.5%Au, 1%Pd, 50%Fe, and some base metals). When I burn this powder using a toch, the powder just burns away without forming a button. Also never used Borax. What am I doing wrong?
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Also after drying the precipitate, what ever grams I get, I can torch to form a Button?
Maybe you could post a picture of you SnCl2 test result?
Well, from your description, i doubt you would be able to achieve that, as it may not contain that much metals in the first place.
You can also precipitate metallic Gold or Platinum using zinc powder.
This can be done by diluting the solution with 2-3 time over with water, filter and adding fine Zinc powder.
Any black or light brown powder would probably mean PGM or Gold (respectively). However, i would suggest not expecting a whole lot of it.