English:

folow step by step using this mentod, i garanty u, that u wont fail.
dont use that many Smb.
20-30 gram Smb enough to precipitate 2-5 gram of gold.
if u see the colour of your aqua regia is green, or slightly green dont try to melted your gold powder.
just filtered your gold powder and dissolve it in new aqua regia.
by the time u get yelow or orange colour of your aqua regia solution, it mean u'll get clean gold powder when u precipitate it.
aqua regia = hcl : Hno3 (3:1)
thank you.

Indonesia:
regia di buat sebelum di gunakan, tidak bisa untuk di simpan.
membuat regia hcl : nitrit / 3:1
lakukan di ruangan terbuka, jaga keslamatan diri sendiri dan orang tersayang di sekitar kita. ada pertanyaan coment aja atau wa langsung.
smb
= sodium metabisulfite