So I have tried to make nitric acid I'm new to this whole gold refining scrapper thing I mean I have a lot of circuit board parts and also have the things that I need to make nitric acid using muriatic acid and hi yield stump remover and add the copper but I can't seem to make nitric acid the furthest that I believe I have gotten is making the brownish fumes and after even letting it sit it does nothing please some any suggestions I have been trying for months