Best regards to all I'm new to the group and refining and would like to seek your valuable comment in the following or direct me to where I can find my answer to what I think is a typical problem.
I performed Aqua Regia in a soil sample and got positive result with Stennous Chloride on cooling. I continue with electrolysis to precipitate the gold and the process was stopped at 20 minutes with 5 Volts and 1 Amp producing a good amount of the dark brown/black precipitate. After about an hour or two I noticed that the amount of particles at the bottom of the beakers were disappearing and the dark cloud was changing from being opaque to clear. At that time I realized that I did not denox the solution so the gold went back into solution again. My question is do I denox and re perform electrolysis or denox and start again with Aqua Regia or denox and reduce the 200 mls with heat and then start the Aqua Regia process followed by denox and then electrolysis. The second question is since I'm dealing with small quantities once the precipitate is formed how long can the precipitate be saved in liquid form or do I need to dry it first then save
Thank you so much
I performed Aqua Regia in a soil sample and got positive result with Stennous Chloride on cooling. I continue with electrolysis to precipitate the gold and the process was stopped at 20 minutes with 5 Volts and 1 Amp producing a good amount of the dark brown/black precipitate. After about an hour or two I noticed that the amount of particles at the bottom of the beakers were disappearing and the dark cloud was changing from being opaque to clear. At that time I realized that I did not denox the solution so the gold went back into solution again. My question is do I denox and re perform electrolysis or denox and start again with Aqua Regia or denox and reduce the 200 mls with heat and then start the Aqua Regia process followed by denox and then electrolysis. The second question is since I'm dealing with small quantities once the precipitate is formed how long can the precipitate be saved in liquid form or do I need to dry it first then save
Thank you so much
